chore(package): update codecov to version 2.0.1

https://greenkeeper.io/

Author: greenkeeper[bot]

package.json

@@ -47,7 +47,7 @@
     "yargs": "^7.0.1"
   },
   "devDependencies": {
-    "codecov": "^1.0.1",
+    "codecov": "^2.0.1",
     "coveralls": "^2.11.6",
     "eslint": "^3.0.0",
     "eslint-config-airbnb-base": "^11.0.0",