Bump typing-extensions from 4.1.1 to 4.2.0 (#447)

Bumps [typing-extensions](https:/python/typing) from 4.1.1 to 4.2.0.
- [Release notes](https:/python/typing/releases)
- [Changelog](https:/python/typing/blob/master/typing_extensions/CHANGELOG)
- [Commits](python/typing@4.1.1...4.2.0)

---
updated-dependencies:
- dependency-name: typing-extensions
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

requirements.txt

@@ -28,7 +28,7 @@ soupsieve==2.3.2
 stem==1.8.0
 torrequest==0.1.0
 tqdm==4.64.0
-typing-extensions==4.1.1
+typing-extensions==4.2.0
 webencodings==0.5.1
 xhtml2pdf==0.2.7
 XMind==1.2.0