Update dependency coveralls to v3.0.4

Author: renovate-bot

package.json

@@ -34,7 +34,7 @@
     "@babel/preset-env": "7.4.5",
     "@babel/register": "7.4.4",
     "ava": "1.4.1",
-    "coveralls": "3.0.3",
+    "coveralls": "3.0.4",
     "esdoc": "1.1.0",
     "esdoc-ecmascript-proposal-plugin": "1.0.0",
     "esdoc-inject-script-plugin": "1.0.0",