fix Minecraft fabric versioning (#247)

* specify fabric loader version

Fabric metadata API no longer supports "latest" so we need to default to a specific version instead.

* update Minecraft version

* remove loader version option

minecraft-fabric/minecraft-fabric-docker.json

@@ -14,14 +14,7 @@
       "desc": "Version of Minecraft to install (Oldest fabric version is 1.14)",
       "display": "GAME VERSION",
       "required": true,
-      "value": "1.20.1"
-    },
-    "loader-version": {
-      "type": "string",
-      "desc": "Version of Fabric Loader to install",
-      "display": "LOADER VERSION",
-      "required": true,
-      "value": "latest"
+      "value": "1.20.2"
     },
     "ip": {
       "type": "string",
@@ -58,7 +51,7 @@
     },
     {
       "commands": [
-        "java -jar fabric-installer.jar server -mcversion ${game-version} -loader ${loader-version} -downloadMinecraft -noprofile"
+        "java -jar fabric-installer.jar server -mcversion ${game-version} -downloadMinecraft -noprofile"
       ],
       "type": "command"
     },