Bump importlib-metadata from 1.5.0 to 6.8.0

Bumps [importlib-metadata](https://github.com/python/importlib_metadata) from 1.5.0 to 6.8.0.
- [Release notes](https://github.com/python/importlib_metadata/releases)
- [Changelog](https://github.com/python/importlib_metadata/blob/main/NEWS.rst)
- [Commits](python/importlib_metadata@v1.5.0...v6.8.0)

---
updated-dependencies:
- dependency-name: importlib-metadata
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

requirements.txt

@@ -17,7 +17,7 @@ entrypoints==0.3
 httplib2==0.14.0
 hyperlink==19.0.0
 idna==2.8
-importlib-metadata==1.5.0
+importlib-metadata==6.8.0
 incremental==16.10.1
 Jinja2==2.10.1
 jsonpatch==1.22