Bump urllib3 from 1.26.13 to 1.26.18 (#52)

Bumps [urllib3](https://github.com/urllib3/urllib3) from 1.26.13 to 1.26.18.
- [Release notes](https://github.com/urllib3/urllib3/releases)
- [Changelog](https://github.com/urllib3/urllib3/blob/main/CHANGES.rst)
- [Commits](urllib3/urllib3@1.26.13...1.26.18)

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

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

requirement_files/Sphinx.txt

@@ -19,4 +19,4 @@ sphinxcontrib-jsmath==1.0.1
 sphinxcontrib-qthelp==1.0.3
 sphinxcontrib-serializinghtml==1.1.5
 sphinxcontrib.applehelp==1.0.3
-urllib3==1.26.13
+urllib3==1.26.18

requirement_files/requests.txt

@@ -2,4 +2,4 @@ certifi==2022.12.7
 charset-normalizer==2.1.1
 idna==3.4
 requests==2.28.1
-urllib3==1.26.13
+urllib3==1.26.18

requirement_files/slacker.txt

@@ -3,4 +3,4 @@ charset-normalizer==2.1.1
 idna==3.4
 requests==2.28.1
 slacker==0.14.0
-urllib3==1.26.13
+urllib3==1.26.18

requirements_recommended.txt

@@ -34,7 +34,7 @@ requests==2.28.1
 six==1.16.0
 tokenize-rt==5.0.0
 tomli==2.0.1
-urllib3==1.26.13
+urllib3==1.26.18
 virtualenv==20.17.1
 xattr==0.10.1
 --no-binary xattr