Update dependency readdirp to v4

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
readdirp	^3.6.0 -> ^4.0.0

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Release Notes

paulmillr/readdirp (readdirp)

### [`v4.0.1`](https://togithub.com/paulmillr/readdirp/releases/tag/4.0.1) [Compare Source](https://togithub.com/paulmillr/readdirp/compare/4.0.0...4.0.1) Quick fix for invalid esm imports. **Full Changelog**: https://github.com/paulmillr/readdirp/compare/4.0.0...4.0.1 ### [`v4.0.0`](https://togithub.com/paulmillr/readdirp/releases/tag/4.0.0) [Compare Source](https://togithub.com/paulmillr/readdirp/compare/3.6.0...4.0.0) - Rewrite in typescript - Support hybrid common.js / esm modules - Remove glob support and all dependencies - Increase minimum node.js from v8 to v14 - Make sure you're using `let {readdirp} = require('readdirp')` in common.js **Full Changelog**: https://github.com/paulmillr/readdirp/compare/3.6.0...4.0.0

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