Bump @babel/core from 7.15.5 to 7.15.8

Bumps [@babel/core](https://github.com/babel/babel/tree/HEAD/packages/babel-core) from 7.15.5 to 7.15.8.
- [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/v7.15.8/packages/babel-core)

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

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

package.json

@@ -10,7 +10,7 @@
     "popper.js": "^1.16.1"
   },
   "devDependencies": {
-    "@babel/core": "^7.15.5",
+    "@babel/core": "^7.15.8",
     "@babel/preset-env": "^7.15.8",
     "autoprefixer": "^9.8.8",
     "braces": "^3.0.2",