fix: pin coveralls to 3.0.5

Author: greenkeeper[bot]

package.json

@@ -28,7 +28,7 @@
     "@types/sinon": "^7.0.12",
     "@types/sinon-chai": "^3.2.2",
     "@types/webpack": "^4.4.32",
-    "coveralls": "^3.0.3",
+    "coveralls": "3.0.5",
     "fork-ts-checker-webpack-plugin": "^1.3.4",
     "happypack": "^5.0.1",
     "html-webpack-plugin": "^3.2.0",