Update dependency coveralls to v3.0.7 (#515)

Author: renovate[bot]

package-lock.json

@@ -40,7 +40,7 @@
   "devDependencies": {
     "chalk": "2.4.2",
     "chromedriver": "77.0.0",
-    "coveralls": "3.0.6",
+    "coveralls": "3.0.7",
     "del": "5.1.0",
     "eslint": "6.5.1",
     "eslint-config-airbnb": "18.0.1",