Bump importlib-metadata from 3.4.0 to 3.7.2

Bumps [importlib-metadata](https://github.com/python/importlib_metadata) from 3.4.0 to 3.7.2.
- [Release notes](https://github.com/python/importlib_metadata/releases)
- [Changelog](https://github.com/python/importlib_metadata/blob/main/CHANGES.rst)
- [Commits](python/importlib_metadata@v3.4.0...v3.7.2)

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

requirements.txt

@@ -7,7 +7,7 @@ Deprecated==1.2.11
 distro==1.5.0
 html2text==2020.1.16
 idna==3.1
-importlib-metadata==3.4.0
+importlib-metadata==3.7.2
 irc==19.0.1
 jaraco.classes==3.2.0
 jaraco.collections==3.2.0