chore(deps-dev): bump axios in /packages/opencensus-exporter-prometheus (#948)

Bumps [axios](https://github.com/axios/axios) from 0.21.1 to 0.21.2.
- [Release notes](https://github.com/axios/axios/releases)
- [Changelog](https://github.com/axios/axios/blob/master/CHANGELOG.md)
- [Commits](axios/axios@v0.21.1...v0.21.2)

---
updated-dependencies:
- dependency-name: axios
  dependency-type: direct:development
...

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

packages/opencensus-exporter-prometheus/package-lock.json

@@ -55,7 +55,7 @@
     "@types/mocha": "8.2.3",
     "@types/node": "10.17.60",
     "@types/serve-static": "1.13.10",
-    "axios": "0.21.1",
+    "axios": "0.21.2",
     "codecov": "3.8.3",
     "gts": "1.1.2",
     "mocha": "7.2.0",