chore(package): update codecov to version 2.0.2

https://greenkeeper.io/

Author: greenkeeperio-bot

package.json

@@ -11,7 +11,7 @@
   },
   "devDependencies": {
     "bluebird": "^3.1.1",
-    "codecov": "^1.0.0",
+    "codecov": "^2.0.2",
     "mocha": "^3.1.2",
     "nyc": "^10.0.0",
     "standard": "^8.4.0"