Bump @babel/core from 7.20.12 to 7.21.0

Bumps [@babel/core](https://github.com/babel/babel/tree/HEAD/packages/babel-core) from 7.20.12 to 7.21.0.
- [Release notes](https://github.com/babel/babel/releases)
- [Changelog](https://github.com/babel/babel/blob/main/CHANGELOG.md)
- [Commits](https://github.com/babel/babel/commits/v7.21.0/packages/babel-core)

---
updated-dependencies:
- dependency-name: "@babel/core"
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

package.json

@@ -69,7 +69,7 @@
   "devDependencies": {
     "ava": "5.2.0",
     "babel-loader": "9.1.2",
-    "@babel/core": "7.20.12",
+    "@babel/core": "7.21.0",
     "@babel/preset-env": "7.20.2",
     "c8": "7.13.0",
     "eslint": "8.34.0",