build(deps-dev): bump codecov from 3.4.0 to 3.6.5

Bumps [codecov](https://github.com/codecov/codecov-node) from 3.4.0 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] <support@github.com>

package.json

@@ -60,7 +60,7 @@
     "@types/sinon-chai": "3.2.2",
     "@types/webpack": "4.4.31",
     "chai": "4.2.0",
-    "codecov": "3.4.0",
+    "codecov": "3.6.5",
     "codelyzer": "4.5.0",
     "commitizen": "3.1.1",
     "concurrently": "4.1.0",