Bump importlib-metadata from 3.3.0 to 3.4.0

Bumps [importlib-metadata](https://github.com/python/importlib_metadata) from 3.3.0 to 3.4.0.
- [Release notes](https://github.com/python/importlib_metadata/releases)
- [Changelog](https://github.com/python/importlib_metadata/blob/main/CHANGES.rst)
- [Commits](python/importlib_metadata@v3.3.0...v3.4.0)

Signed-off-by: dependabot-preview[bot] <[email protected]>

Author: dependabot-preview[bot]

requirements.txt

@@ -37,7 +37,7 @@ pyflakes==2.2.0
 mccabe==0.6.1
 pycodestyle==2.6.0
 configparser==5.0.1
-importlib-metadata==3.3.0  # for flake8
+importlib-metadata==3.4.0  # for flake8
 typing_extensions==3.7.4.3
 zipp==3.4.0  # for flake8
 flake8==3.8.4