chore(package): update coveralls to version 3.0.8

Closes #23

Author: greenkeeper[bot]

package.json

@@ -32,7 +32,7 @@
     "chai": "^4.1.2",
     "condition-circle": "^1.5.0",
     "conventional-commit-types": "^2.1.0",
-    "coveralls": "^2.13.0",
+    "coveralls": "^3.0.8",
     "eslint-config-fullcube": "^3.0.0",
     "loopback": "^3.6.0",
     "loopback-testing": "^1.4.0",