chore(package): update worker-loader to version 2.0.0 (#349)

Author: greenkeeper[bot]

package.json

@@ -60,7 +60,7 @@
     "webpack": "^4.0.0 || ^4.0.0-beta.* || ^3.8.1 || ^3.0.0 || ^3.0.0-rc.0 || ^2.1.0 || ^1.13.1",
     "webpack-cli": "^3.0.0",
     "webpack-isomorphic-tools": "^3.0.0",
-    "worker-loader": "^1.1.1"
+    "worker-loader": "^2.0.0"
   },
   "peerDependencies": {
     "webpack": "*"