Bump @babel/preset-env from 7.15.8 to 7.16.4 (source-academy#717)

Bumps [@babel/preset-env](https://github.com/babel/babel/tree/HEAD/packages/babel-preset-env) from 7.15.8 to 7.16.4.
- [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/v7.16.4/packages/babel-preset-env)

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

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 @@
   "devDependencies": {
     "@babel/core": "^7.16.0",
     "@babel/node": "^7.16.0",
-    "@babel/preset-env": "^7.15.8",
+    "@babel/preset-env": "^7.16.4",
     "fs-extra": "^10.0.0",
     "http-server": "^14.0.0",
     "js-slang": "^0.5.22",