Update urllib3 requirement from ==2.0.* to ==2.1.* (#91)

Updates the requirements on [urllib3](https://github.com/urllib3/urllib3) to permit the latest version.
- [Release notes](https://github.com/urllib3/urllib3/releases)
- [Changelog](https://github.com/urllib3/urllib3/blob/main/CHANGES.rst)
- [Commits](urllib3/urllib3@2.0.0a1...2.1.0)

---
updated-dependencies:
- dependency-name: urllib3
  dependency-type: direct:production
...

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

requirements.txt

@@ -4,4 +4,4 @@ idna==3.4
 kdtree==0.16
 osm-conflate==1.4.1
 requests==2.31.*
-urllib3==2.0.*
+urllib3==2.1.*