Removed symfony 3.x

.travis.yml

@@ -18,27 +18,13 @@ matrix:
       env: COMPOSER_FLAGS="--prefer-stable --prefer-lowest" SYMFONY_DEPRECATIONS_HELPER="weak_vendors"
     - php: 7.2
       env: COMPOSER_FLAGS="--prefer-stable --prefer-lowest" SYMFONY_DEPRECATIONS_HELPER="weak_vendors"
-    - php: 7.1
-      env: COMPOSER_FLAGS="--prefer-stable --prefer-lowest" SYMFONY_DEPRECATIONS_HELPER="weak_vendors"
 
       # Test the latest stable release
-    - php: 7.1
-      env: COVERAGE=true PHPUNIT_FLAGS="-v --coverage-text"
     - php: 7.2
       env: COVERAGE=true PHPUNIT_FLAGS="-v --coverage-text"
     - php: 7.3
       env: COVERAGE=true PHPUNIT_FLAGS="-v --coverage-text"
 
-      # Test LTS versions. This makes sure we do not use Symfony packages with version greater
-      # than 2 or 3 respectively. Read more at https://github.com/symfony/lts
-    - php: 7.2
-      env: DEPENDENCIES="symfony/lts:^3"
-
-    - php: 7.2
-      env: DEPENDENCIES="symfony/lts:^4"
-    - php: 7.3
-      env: DEPENDENCIES="symfony/lts:^4"
-
       # Latest commit to master
     - php: 7.2
       env: STABILITY="dev"

composer.json

@@ -10,17 +10,17 @@
         }
     ],
     "require": {
-        "php": "^7.1.3",
+        "php": "^7.2",
         "jdorn/sql-formatter": "^1.2"
     },
     "require-dev": {
         "ext-json": "*",
-        "symfony/config": "^3.4 || ^4.4",
-        "symfony/dependency-injection": "^3.4 || ^4.4",
-        "symfony/http-kernel": "^3.4 || ^4.4",
-        "symfony/framework-bundle": "^3.4 || ^4.4",
-        "symfony/phpunit-bridge": "^3.4 || ^4.4",
-        "symfony/browser-kit": "^3.4 || ^5.0"
+        "symfony/config": "^4.4",
+        "symfony/dependency-injection": "^4.4",
+        "symfony/http-kernel": "^4.4",
+        "symfony/framework-bundle": "^4.4",
+        "symfony/phpunit-bridge": "^4.4",
+        "symfony/browser-kit": "^5.0"
     },
     "autoload": {
         "psr-4": {