chore(coverage): Add codecov.io dep

Author: Kent C. Dodds

package.json

@@ -36,6 +36,7 @@
     "babel-preset-es2015": "6.3.13",
     "babel-preset-stage-2": "6.3.13",
     "babel-register": "6.4.3",
+    "codecov.io": "0.1.6",
     "commitizen": "2.5.0",
     "cz-conventional-changelog": "1.1.5",
     "eslint": "1.10.3",