chore(package): update coveralls to version 3.0.9

Author: greenkeeper[bot]

package.json

@@ -31,7 +31,7 @@
   "homepage": "https://github.com/willmendesneto/node-github-diff#readme",
   "devDependencies": {
     "changelog-verify": "^1.1.0",
-    "coveralls": "^3.0.2",
+    "coveralls": "^3.0.9",
     "editorconfig-tools": "^0.1.1",
     "eslint": "^6.0.0",
     "mocha": "^6.1.2",