deps(dev): bump @types/readable-stream from 2.3.15 to 4.0.1 (#352)

Bumps [@types/readable-stream](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/readable-stream) from 2.3.15 to 4.0.1.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/readable-stream)

---
updated-dependencies:
- dependency-name: "@types/readable-stream"
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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Author: dependabot[bot]

packages/ipfs-unixfs-exporter/package.json

@@ -154,7 +154,7 @@
     "uint8arrays": "^4.0.2"
   },
   "devDependencies": {
-    "@types/readable-stream": "^2.3.15",
+    "@types/readable-stream": "^4.0.1",
     "@types/sinon": "^10.0.0",
     "aegir": "^39.0.6",
     "blockstore-core": "^4.0.1",