Bump urllib3 from 1.7 to 1.24.2

Bumps [urllib3](https://github.com/urllib3/urllib3) from 1.7 to 1.24.2.
- [Release notes](https://github.com/urllib3/urllib3/releases)
- [Changelog](https://github.com/urllib3/urllib3/blob/master/CHANGES.rst)
- [Commits](https://github.com/urllib3/urllib3/compare/1.7...1.24.2)

Signed-off-by: dependabot[bot] <support@github.com>

setup.py

@@ -10,7 +10,7 @@ setup(
     author="Brett Langdon",
     author_email="brett@blangdon.com",
     packages=find_packages(),
-    install_requires=["urllib3==1.7"],
+    install_requires=["urllib3==1.24.2"],
     setup_requires=["nose>=1.0"],
     description="A Memcached like interface to Riak",
     license="MIT",