Bump codecov from 3.5.0 to 3.6.5

Bumps [codecov](https://github.com/codecov/codecov-node) from 3.5.0 to 3.6.5.
- [Release notes](https://github.com/codecov/codecov-node/releases)
- [Commits](https://github.com/codecov/codecov-node/commits)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

package-lock.json

@@ -78,7 +78,7 @@
     "webpack-cli": "^3.3.0",
     "webpack-dev-middleware": "^3.6.1",
     "webpack-hot-middleware": "^2.24.3",
-    "codecov": "^3.5.0"
+    "codecov": "^3.6.5"
   },
   "engineStrict": true,
   "engines": {