chore(package): update coveralls to version 3.0.9

Closes #2

Author: greenkeeper[bot]

package.json

@@ -35,7 +35,7 @@
   "homepage": "https://github.com/nextorigin/redis-sorted-cache#readme",
   "devDependencies": {
     "chai": "^4.1.2",
-    "coveralls": "^2.11.12",
+    "coveralls": "^3.0.9",
     "iced-coffee-coverage": "^1.0.3",
     "iced-coffee-script": "^108.0.11",
     "istanbul": "^0.4.5",