Bump proxy-py from 2.4.0rc3 to 2.4.0rc4 (aio-libs#6449)

* Bump proxy-py from 2.4.0rc3 to 2.4.0rc4

Bumps [proxy-py](https://github.com/abhinavsingh/proxy.py) from 2.4.0rc3 to 2.4.0rc4.
- [Release notes](https://github.com/abhinavsingh/proxy.py/releases)
- [Changelog](https://github.com/abhinavsingh/proxy.py/blob/develop/CHANGELOG.md)
- [Commits](abhinavsingh/proxy.py@v2.4.0rc3...v2.4.0rc4)

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

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

* Recompile requirements/constraints.txt

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

requirements/constraints.txt

@@ -126,7 +126,7 @@ pluggy==1.0.0
     # via pytest
 pre-commit==2.16.0
     # via -r requirements/lint.txt
-proxy.py==2.4.0rc3
+proxy.py==2.4.0rc4
     # via -r requirements/test.txt
 py==1.10.0
     # via pytest

requirements/test.txt

@@ -5,7 +5,7 @@ cryptography==36.0.1; platform_machine!="i686" # no 32-bit wheels; no python 3.9
 freezegun==1.1.0
 mypy==0.930; implementation_name=="cpython"
 mypy-extensions==0.4.3; implementation_name=="cpython"
-proxy.py ~= 2.4.0rc3
+proxy.py ~= 2.4.0rc4
 pytest==6.2.5
 pytest-cov==3.0.0
 pytest-mock==3.6.1