Bump esbuild from 0.21.3 to 0.21.4 (opentypejs#720)

Bumps [esbuild](https://github.com/evanw/esbuild) from 0.21.3 to 0.21.4.
- [Release notes](https://github.com/evanw/esbuild/releases)
- [Changelog](https://github.com/evanw/esbuild/blob/main/CHANGELOG.md)
- [Commits](evanw/esbuild@v0.21.3...v0.21.4)

---
updated-dependencies:
- dependency-name: esbuild
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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