chore(deps-dev): Bump @octokit/rest from 16.9.0 to 21.1.0

Bumps [@octokit/rest](https://github.com/octokit/rest.js) from 16.9.0 to 21.1.0.
- [Release notes](https://github.com/octokit/rest.js/releases)
- [Commits](octokit/rest.js@v16.9.0...v21.1.0)

---
updated-dependencies:
- dependency-name: "@octokit/rest"
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

package.json

@@ -61,7 +61,7 @@
     "@babel/preset-env": "^7.0.0",
     "@babel/runtime": "^7.0.0",
     "@jesses/circle-github-bot": "^2.1.0",
-    "@octokit/rest": "^16.9.0",
+    "@octokit/rest": "^21.1.0",
     "babel-core": "^7.0.0-bridge.0",
     "babel-eslint": "^10.0.1",
     "babel-jest": "^23.4.2",