diff --git a/demo-vue/package-lock.json b/demo-vue/package-lock.json
index a6c26fa..8d7f655 100644
--- a/demo-vue/package-lock.json
+++ b/demo-vue/package-lock.json
@@ -5,18 +5,30 @@
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   "dependencies": {
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-      "resolved": "https://registry.npmjs.org/@angular-devkit/core/-/core-7.1.4.tgz",
-      "integrity": "sha512-3cBVHjSQjMyE/mIyOX82ekdybNRQlN+kUfmdZS6oVW9aV48vdxcVbEGdl8t1H4enMf89u8kXiAAET9jFaqWopg==",
+      "version": "8.2.0",
+      "resolved": "https://registry.npmjs.org/@angular-devkit/core/-/core-8.2.0.tgz",
+      "integrity": "sha512-jZQn5hQ84++00+yuD/Ak303/Q06keFVyd+QbSfVrpHTFyOwPeNNSPLbN6A0S7X3bKOuoZhUHg+eQBa5BljVC2g==",
       "dev": true,
       "requires": {
-        "ajv": "6.5.3",
-        "chokidar": "2.0.4",
+        "ajv": "6.10.2",
         "fast-json-stable-stringify": "2.0.0",
-        "rxjs": "6.3.3",
+        "magic-string": "0.25.3",
+        "rxjs": "6.4.0",
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+        "ajv": {
+          "version": "6.10.2",
+          "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.10.2.tgz",
+          "integrity": "sha512-TXtUUEYHuaTEbLZWIKUr5pmBuhDLy+8KYtPYdcV8qC+pOZL+NKqYwvWSRrVXHn+ZmRRAu8vJTAznH7Oag6RVRw==",
+          "dev": true,
+          "requires": {
+            "fast-deep-equal": "^2.0.1",
+            "fast-json-stable-stringify": "^2.0.0",
+            "json-schema-traverse": "^0.4.1",
+            "uri-js": "^4.2.2"
+          }
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@@ -1013,50 +1025,23 @@
         "acorn": "^5.0.0"
       }
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+    "acorn-walk": {
+      "version": "6.2.0",
+      "resolved": "https://registry.npmjs.org/acorn-walk/-/acorn-walk-6.2.0.tgz",
+      "integrity": "sha512-7evsyfH1cLOCdAzZAd43Cic04yKydNx0cF+7tiA19p1XnLLPU4dpCQOqpjqwokFe//vS0QqfqqjCS2JkiIs0cA==",
+      "dev": true
+    },
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-      "resolved": "https://registry.npmjs.org/adjust-sourcemap-loader/-/adjust-sourcemap-loader-1.2.0.tgz",
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+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/adjust-sourcemap-loader/-/adjust-sourcemap-loader-2.0.0.tgz",
+      "integrity": "sha512-4hFsTsn58+YjrU9qKzML2JSSDqKvN8mUGQ0nNIrfPi8hmIONT4L3uUaT6MKdMsZ9AjsU6D2xDkZxCkbQPxChrA==",
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-        "camelcase": "^1.2.1",
-        "loader-utils": "^1.1.0",
-        "lodash.assign": "^4.0.1",
-        "lodash.defaults": "^3.1.2",
-        "object-path": "^0.9.2",
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-          "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-1.2.1.tgz",
-          "integrity": "sha1-m7UwTS4LVmmLLHWLCKPqqdqlijk=",
-          "dev": true
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-        "lodash.defaults": {
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-          "resolved": "https://registry.npmjs.org/lodash.defaults/-/lodash.defaults-3.1.2.tgz",
-          "integrity": "sha1-xzCLGNv4vJNy1wGnNJPGEZK9Liw=",
-          "dev": true,
-          "requires": {
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-            "lodash.restparam": "^3.0.0"
-          },
-          "dependencies": {
-            "lodash.assign": {
-              "version": "3.2.0",
-              "resolved": "https://registry.npmjs.org/lodash.assign/-/lodash.assign-3.2.0.tgz",
-              "integrity": "sha1-POnwI0tLIiPilrj6CsH+6OvKZPo=",
-              "dev": true,
-              "requires": {
-                "lodash._baseassign": "^3.0.0",
-                "lodash._createassigner": "^3.0.0",
-                "lodash.keys": "^3.0.0"
-              }
-            }
-          }
-        }
+        "assert": "1.4.1",
+        "camelcase": "5.0.0",
+        "loader-utils": "1.2.3",
+        "object-path": "0.11.4",
+        "regex-parser": "2.2.10"
       }
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     "ajv": {
@@ -1265,9 +1250,9 @@
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-      "resolved": "https://registry.npmjs.org/aws4/-/aws4-1.8.0.tgz",
-      "integrity": "sha512-ReZxvNHIOv88FlT7rxcXIIC0fPt4KZqZbOlivyWtXLt8ESx84zd3kMC6iK5jVeS2qt+g7ftS7ye4fi06X5rtRQ==",
+      "version": "1.10.1",
+      "resolved": "https://registry.npmjs.org/aws4/-/aws4-1.10.1.tgz",
+      "integrity": "sha512-zg7Hz2k5lI8kb7U32998pRRFin7zJlkfezGJjUc2heaD4Pw2wObakCDVzkKztTm/Ln7eiVvYsjqak0Ed4LkMDA==",
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@@ -1503,15 +1488,29 @@
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-      "resolved": "https://registry.npmjs.org/bfj/-/bfj-6.1.1.tgz",
-      "integrity": "sha512-+GUNvzHR4nRyGybQc2WpNJL4MJazMuvf92ueIyA0bIkPRwhhQu3IfZQ2PSoVPpCBJfmoSdOxu5rnotfFLlvYRQ==",
+      "version": "6.1.2",
+      "resolved": "https://registry.npmjs.org/bfj/-/bfj-6.1.2.tgz",
+      "integrity": "sha512-BmBJa4Lip6BPRINSZ0BPEIfB1wUY/9rwbwvIHQA1KjX9om29B6id0wnWXq7m3bn5JrUVjeOTnVuhPT1FiHwPGw==",
       "dev": true,
       "requires": {
-        "bluebird": "^3.5.1",
-        "check-types": "^7.3.0",
-        "hoopy": "^0.1.2",
-        "tryer": "^1.0.0"
+        "bluebird": "^3.5.5",
+        "check-types": "^8.0.3",
+        "hoopy": "^0.1.4",
+        "tryer": "^1.0.1"
+      },
+      "dependencies": {
+        "bluebird": {
+          "version": "3.7.2",
+          "resolved": "https://registry.npmjs.org/bluebird/-/bluebird-3.7.2.tgz",
+          "integrity": "sha512-XpNj6GDQzdfW+r2Wnn7xiSAd7TM3jzkxGXBGTtWKuSXv1xUV+azxAm8jdWZN06QTQk+2N2XB9jRDkvbmQmcRtg==",
+          "dev": true
+        },
+        "check-types": {
+          "version": "8.0.3",
+          "resolved": "https://registry.npmjs.org/check-types/-/check-types-8.0.3.tgz",
+          "integrity": "sha512-YpeKZngUmG65rLudJ4taU7VLkOCTMhNl/u4ctNC56LQS/zJTyNH0Lrtwm1tfTsbLlwvlfsA2d1c8vCf/Kh2KwQ==",
+          "dev": true
+        }
       }
     },
     "bfj-node4": {
@@ -1743,12 +1742,6 @@
       "integrity": "sha1-JuYe0UIvtw3ULm42cp7VHYVf6Nk=",
       "dev": true
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-    "builtin-modules": {
-      "version": "1.1.1",
-      "resolved": "https://registry.npmjs.org/builtin-modules/-/builtin-modules-1.1.1.tgz",
-      "integrity": "sha1-Jw8HbFpywC9bZaR9+Uxf46J4iS8=",
-      "dev": true
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@@ -2008,9 +2001,9 @@
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-      "resolved": "https://registry.npmjs.org/combined-stream/-/combined-stream-1.0.7.tgz",
-      "integrity": "sha512-brWl9y6vOB1xYPZcpZde3N9zDByXTosAeMDo4p1wzo6UMOX4vumB+TP1RZ76sfE6Md68Q0NJSrE/gbezd4Ul+w==",
+      "version": "1.0.8",
+      "resolved": "https://registry.npmjs.org/combined-stream/-/combined-stream-1.0.8.tgz",
+      "integrity": "sha512-FQN4MRfuJeHf7cBbBMJFXhKSDq+2kAArBlmRBvcvFE5BB1HZKXtSFASDhdlz9zOYwxh8lDdnvmMOe/+5cdoEdg==",
       "dev": true,
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@@ -2307,21 +2300,48 @@
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-      "resolved": "https://registry.npmjs.org/css/-/css-2.2.4.tgz",
-      "integrity": "sha512-oUnjmWpy0niI3x/mPL8dVEI1l7MnG3+HHyRPHf+YFSbK+svOhXpmSOcDURUh2aOCgl2grzrOPt1nHLuCVFULLw==",
+      "version": "2.2.1",
+      "resolved": "https://registry.npmjs.org/css/-/css-2.2.1.tgz",
+      "integrity": "sha1-c6TIHehdtmTU7mdPfUcIXjstVdw=",
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       "requires": {
-        "inherits": "^2.0.3",
-        "source-map": "^0.6.1",
-        "source-map-resolve": "^0.5.2",
+        "inherits": "^2.0.1",
+        "source-map": "^0.1.38",
+        "source-map-resolve": "^0.3.0",
         "urix": "^0.1.0"
       },
       "dependencies": {
+        "atob": {
+          "version": "1.1.3",
+          "resolved": "https://registry.npmjs.org/atob/-/atob-1.1.3.tgz",
+          "integrity": "sha1-lfE2KbEsOlGl0hWr3OKqnzL4B3M=",
+          "dev": true
+        },
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-          "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
-          "integrity": "sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==",
+          "version": "0.1.43",
+          "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.1.43.tgz",
+          "integrity": "sha1-wkvBRspRfBRx9drL4lcbK3+eM0Y=",
+          "dev": true,
+          "requires": {
+            "amdefine": ">=0.0.4"
+          }
+        },
+        "source-map-resolve": {
+          "version": "0.3.1",
+          "resolved": "https://registry.npmjs.org/source-map-resolve/-/source-map-resolve-0.3.1.tgz",
+          "integrity": "sha1-YQ9hIqRFuN1RU1oqcbeD38Ekh2E=",
+          "dev": true,
+          "requires": {
+            "atob": "~1.1.0",
+            "resolve-url": "~0.2.1",
+            "source-map-url": "~0.3.0",
+            "urix": "~0.1.0"
+          }
+        },
+        "source-map-url": {
+          "version": "0.3.0",
+          "resolved": "https://registry.npmjs.org/source-map-url/-/source-map-url-0.3.0.tgz",
+          "integrity": "sha1-fsrxO1e80J2opAxdJp2zN5nUqvk=",
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@@ -2413,12 +2433,13 @@
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-      "resolved": "https://registry.npmjs.org/d/-/d-1.0.0.tgz",
-      "integrity": "sha1-dUu1v+VUUdpppYuU1F9MWwRi1Y8=",
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/d/-/d-1.0.1.tgz",
+      "integrity": "sha512-m62ShEObQ39CfralilEQRjH6oAMtNCV1xJyEx5LpRYUVN+EviphDgUc/F3hnYbADmkiNs67Y+3ylmlG7Lnu+FA==",
       "dev": true,
       "requires": {
-        "es5-ext": "^0.10.9"
+        "es5-ext": "^0.10.50",
+        "type": "^1.0.1"
       }
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     "dashdash": {
@@ -2716,14 +2737,14 @@
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-      "resolved": "https://registry.npmjs.org/es5-ext/-/es5-ext-0.10.47.tgz",
-      "integrity": "sha512-/1TItLfj+TTfWoeRcDn/0FbGV6SNo4R+On2GGVucPU/j3BWnXE2Co8h8CTo4Tu34gFJtnmwS9xiScKs4EjZhdw==",
+      "version": "0.10.53",
+      "resolved": "https://registry.npmjs.org/es5-ext/-/es5-ext-0.10.53.tgz",
+      "integrity": "sha512-Xs2Stw6NiNHWypzRTY1MtaG/uJlwCk8kH81920ma8mvN8Xq1gsfhZvpkImLQArw8AHnv8MT2I45J3c0R8slE+Q==",
       "dev": true,
       "requires": {
         "es6-iterator": "~2.0.3",
-        "es6-symbol": "~3.1.1",
-        "next-tick": "1"
+        "es6-symbol": "~3.1.3",
+        "next-tick": "~1.0.0"
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@@ -2738,13 +2759,13 @@
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-      "integrity": "sha1-vwDvT9q2uhtG7Le2KbTH7VcVzHc=",
+      "version": "3.1.3",
+      "resolved": "https://registry.npmjs.org/es6-symbol/-/es6-symbol-3.1.3.tgz",
+      "integrity": "sha512-NJ6Yn3FuDinBaBRWl/q5X/s4koRHBrgKAu+yGI6JCBeiu3qrcbJhwT2GeR/EXVfylRk8dpQVJoLEFhK+Mu31NA==",
       "dev": true,
       "requires": {
-        "d": "1",
-        "es5-ext": "~0.10.14"
+        "d": "^1.0.1",
+        "ext": "^1.1.2"
       }
     },
     "escape-html": {
@@ -2941,6 +2962,23 @@
         }
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+    "ext": {
+      "version": "1.4.0",
+      "resolved": "https://registry.npmjs.org/ext/-/ext-1.4.0.tgz",
+      "integrity": "sha512-Key5NIsUxdqKg3vIsdw9dSuXpPCQ297y6wBjL30edxwPgt2E44WcWBZey/ZvUc6sERLTxKdyCu4gZFmUbk1Q7A==",
+      "dev": true,
+      "requires": {
+        "type": "^2.0.0"
+      },
+      "dependencies": {
+        "type": {
+          "version": "2.1.0",
+          "resolved": "https://registry.npmjs.org/type/-/type-2.1.0.tgz",
+          "integrity": "sha512-G9absDWvhAWCV2gmF1zKud3OyC61nZDwWvBL2DApaVFogI07CprggiQAOOjvp2NRjYWFzPyu7vwtDrQFq8jeSA==",
+          "dev": true
+        }
+      }
+    },
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       "resolved": "https://registry.npmjs.org/extend/-/extend-3.0.2.tgz",
@@ -3198,6 +3236,22 @@
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       "dev": true
     },
+    "fork-ts-checker-webpack-plugin": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/fork-ts-checker-webpack-plugin/-/fork-ts-checker-webpack-plugin-2.0.0.tgz",
+      "integrity": "sha512-9FWDlYAkuJFvWW6/uykliAAbhneLOS1PK3z9DjFAt3BLaUsCcFHFFzICSot998J4VPvT6aA8F+XIlxE0q0G6Tg==",
+      "dev": true,
+      "requires": {
+        "babel-code-frame": "^6.22.0",
+        "chalk": "^2.4.1",
+        "chokidar": "^2.0.4",
+        "micromatch": "^3.1.10",
+        "minimatch": "^3.0.4",
+        "semver": "^5.6.0",
+        "tapable": "^1.0.0",
+        "worker-rpc": "^0.1.0"
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       "version": "2.3.3",
       "resolved": "https://registry.npmjs.org/form-data/-/form-data-2.3.3.tgz",
@@ -3278,7 +3332,8 @@
         "ansi-regex": {
           "version": "2.1.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "aproba": {
           "version": "1.2.0",
@@ -3299,12 +3354,14 @@
         "balanced-match": {
           "version": "1.0.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "brace-expansion": {
           "version": "1.1.11",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "balanced-match": "^1.0.0",
             "concat-map": "0.0.1"
@@ -3319,17 +3376,20 @@
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           "version": "1.1.0",
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-          "dev": true
+          "dev": true,
+          "optional": true
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         "concat-map": {
           "version": "0.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
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         "console-control-strings": {
           "version": "1.1.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
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@@ -3446,7 +3506,8 @@
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           "version": "2.0.3",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
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@@ -3458,6 +3519,7 @@
           "version": "1.0.0",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "number-is-nan": "^1.0.0"
           }
@@ -3472,6 +3534,7 @@
           "version": "3.0.4",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
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@@ -3479,12 +3542,14 @@
         "minimist": {
           "version": "0.0.8",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
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           "version": "2.3.5",
           "bundled": true,
           "dev": true,
+          "optional": true,
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@@ -3503,6 +3568,7 @@
           "version": "0.5.1",
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+          "optional": true,
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@@ -3583,7 +3649,8 @@
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           "version": "1.0.1",
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-          "dev": true
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+          "optional": true
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@@ -3595,6 +3662,7 @@
           "version": "1.4.0",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
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@@ -3680,7 +3748,8 @@
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           "version": "5.1.2",
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-          "dev": true
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+          "optional": true
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@@ -3716,6 +3785,7 @@
           "version": "1.0.2",
           "bundled": true,
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@@ -3735,6 +3805,7 @@
           "version": "3.0.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
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@@ -3778,19 +3849,21 @@
         "wrappy": {
           "version": "1.0.2",
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-          "dev": true
+          "dev": true,
+          "optional": true
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         "yallist": {
           "version": "3.0.3",
           "bundled": true,
-          "dev": true
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-      "resolved": "https://registry.npmjs.org/fstream/-/fstream-1.0.11.tgz",
-      "integrity": "sha1-XB+x8RdHcRTwYyoOtLcbPLD9MXE=",
+      "version": "1.0.12",
+      "resolved": "https://registry.npmjs.org/fstream/-/fstream-1.0.12.tgz",
+      "integrity": "sha512-WvJ193OHa0GHPEL+AycEJgxvBEwyfRkN1vhjca23OaPVMCaLCXTd5qAu82AjTcgP1UJmytkOKb63Ypde7raDIg==",
       "dev": true,
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@@ -8140,9 +8447,9 @@
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+      "resolved": "https://registry.npmjs.org/uuid/-/uuid-3.4.0.tgz",
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     "v8-compile-cache": {
@@ -8413,6 +8720,15 @@
         "errno": "~0.1.7"
       }
     },
+    "worker-rpc": {
+      "version": "0.1.1",
+      "resolved": "https://registry.npmjs.org/worker-rpc/-/worker-rpc-0.1.1.tgz",
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+      "dev": true,
+      "requires": {
+        "microevent.ts": "~0.1.1"
+      }
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@@ -8467,9 +8783,9 @@
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+      "resolved": "https://registry.npmjs.org/ws/-/ws-6.2.1.tgz",
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diff --git a/demo-vue/package.json b/demo-vue/package.json
index adc0442..3f415f4 100644
--- a/demo-vue/package.json
+++ b/demo-vue/package.json
@@ -33,7 +33,7 @@
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-    "node-sass": "^4.9.2",
+    "node-sass": "^4.13.1",
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     "terser-webpack-plugin": "^1.1.0",
     "tns-platform-declarations": "^5.1.2",