Bump @shgysk8zer0/importmap from 1.8.3 to 1.8.7

Bumps [@shgysk8zer0/importmap](https://github.com/shgysk8zer0/importmap) from 1.8.3 to 1.8.7.
- [Release notes](https://github.com/shgysk8zer0/importmap/releases)
- [Changelog](https://github.com/shgysk8zer0/importmap/blob/master/CHANGELOG.md)
- [Commits](shgysk8zer0/importmap@v1.8.3...v1.8.7)

---
updated-dependencies:
- dependency-name: "@shgysk8zer0/importmap"
  dependency-version: 1.8.7
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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Author: dependabot[bot]