Bump micromatch and readdirp (#14498)

Bumps [micromatch](https://github.com/micromatch/micromatch) and [readdirp](https://github.com/paulmillr/readdirp). These dependencies needed to be updated together.

Updates `micromatch` from 4.0.5 to 4.0.8
- [Release notes](https://github.com/micromatch/micromatch/releases)
- [Changelog](https://github.com/micromatch/micromatch/blob/4.0.8/CHANGELOG.md)
- [Commits](micromatch/micromatch@4.0.5...4.0.8)

Updates `micromatch` from 4.0.7 to 4.0.8
- [Release notes](https://github.com/micromatch/micromatch/releases)
- [Changelog](https://github.com/micromatch/micromatch/blob/4.0.8/CHANGELOG.md)
- [Commits](micromatch/micromatch@4.0.5...4.0.8)

Updates `readdirp` from 2.2.1 to 3.6.0
- [Release notes](https://github.com/paulmillr/readdirp/releases)
- [Commits](paulmillr/readdirp@2.2.1...3.6.0)

---
updated-dependencies:
- dependency-name: micromatch
  dependency-type: indirect
- dependency-name: micromatch
  dependency-type: indirect
- dependency-name: readdirp
  dependency-type: indirect
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Matty Stratton <matt.stratton@gmail.com>

Author: dependabot[bot]