Bump proxy-py from 2.3.1 to 2.4.7

Bumps [proxy-py](https://github.com/abhinavsingh/proxy.py) from 2.3.1 to 2.4.7.
- [Release notes](https://github.com/abhinavsingh/proxy.py/releases)
- [Changelog](https://github.com/abhinavsingh/proxy.py/blob/develop/CHANGELOG.md)
- [Commits](abhinavsingh/proxy.py@v2.3.1...v2.4.7)

---
updated-dependencies:
- dependency-name: proxy-py
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

requirements-dev.txt

@@ -8,5 +8,5 @@ pytest-cov==2.12.1
 pytest-json-report==1.4.0
 pytest-aiohttp==0.3.0
 pytest-custom_exit_code==0.3.0
-proxy.py==2.3.1
+proxy.py==2.4.7
 pysocks==1.7.1