Bump codecov from 1.0.1 to 3.7.1

Bumps [codecov](https://github.com/codecov/codecov-node) from 1.0.1 to 3.7.1.
- [Release notes](https://github.com/codecov/codecov-node/releases)
- [Commits](codecov/codecov-node@v1.0.1...v3.7.1)

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

Author: dependabot[bot]

package.json

@@ -23,7 +23,7 @@
     "babel-preset-es2015": "^6.9.0",
     "babel-preset-stage-0": "^6.5.0",
     "chai": "^4.2.0",
-    "codecov": "^1.0.1",
+    "codecov": "^3.7.1",
     "eslint": "^7.11.0",
     "mocha": "^8.1.3",
     "nyc": "^15.1.0",