chore(deps): update dependency coveralls to v3.0.8

Author: renovate-bot

package.json

@@ -45,7 +45,7 @@
   "devDependencies": {
     "@types/cucumber": "3.2.1",
     "@types/node": "8.5.7",
-    "coveralls": "3.0.0",
+    "coveralls": "3.0.8",
     "cucumber": "3.2.1",
     "nyc": "11.4.1",
     "semantic-release": "12.1.0",