chore(package): update codecov to version 3.6.0

Closes #107

Author: greenkeeper[bot]

package.json

@@ -65,7 +65,7 @@
     "angular-cli-ghpages": "0.5.1",
     "angular-library-builder": "1.5.11",
     "bootstrap": "3.3.7",
-    "codecov": "^2.0.2",
+    "codecov": "^3.6.0",
     "codelyzer": "3.0.1",
     "commitizen": "2.9.6",
     "core-js": "^2.4.1",