build(deps-dev): update codecov requirement from 3.0.4 to 3.1.0

Updates the requirements on [codecov](https://github.com/codecov/codecov-node) to permit the latest version.
- [Release notes](https://github.com/codecov/codecov-node/releases)
- [Commits](https://github.com/codecov/codecov-node/commits/v3.1.0)

Signed-off-by: dependabot[bot] <support@dependabot.com>

package.json

@@ -24,7 +24,7 @@
   },
   "devDependencies": {
     "chai": "4.1.2",
-    "codecov": "3.0.4",
+    "codecov": "3.1.0",
     "conventional-changelog-metahub": "2.0.2",
     "cz-conventional-changelog": "2.1.0",
     "mocha": "5.2.0",