pip: bump urllib3 from 1.26.18 to 1.26.19 (#215)

Bumps [urllib3](https://github.com/urllib3/urllib3) from 1.26.18 to 1.26.19.
- [Release notes](https://github.com/urllib3/urllib3/releases)
- [Changelog](https://github.com/urllib3/urllib3/blob/1.26.19/CHANGES.rst)
- [Commits](urllib3/urllib3@1.26.18...1.26.19)

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

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

Author: dependabot[bot]

requirements.txt

@@ -32,4 +32,4 @@ sphinxcontrib-serializinghtml==1.1.10
 sphinxext-opengraph==0.9.1
 tqdm==4.66.4
 translate-toolkit==3.13.0
-urllib3==1.26.18
+urllib3==1.26.19