chore(deps): bump react-codemirror2 from 7.2.1 to 8.0.0 (#529)

Bumps [react-codemirror2](https://github.com/scniro/react-codemirror2) from 7.2.1 to 8.0.0.
- [Release notes](https://github.com/scniro/react-codemirror2/releases)
- [Changelog](https://github.com/scniro/react-codemirror2/blob/master/CHANGELOG.md)
- [Commits](https://github.com/scniro/react-codemirror2/commits/8.0.0)

---
updated-dependencies:
- dependency-name: react-codemirror2
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

package.json

@@ -27,7 +27,7 @@
     "codemirror": "^5.54.0",
     "codemirror-graphql": "1.0.2",
     "prop-types": "^15.7.2",
-    "react-codemirror2": "^7.2.1"
+    "react-codemirror2": "^8.0.0"
   },
   "peerDependencies": {
     "@readme/variable": "15.x || 16.x",