build(deps): bump humanize from 4.8.0 to 4.9.0

Bumps [humanize](https://github.com/python-humanize/humanize) from 4.8.0 to 4.9.0.
- [Release notes](https://github.com/python-humanize/humanize/releases)
- [Commits](https://github.com/python-humanize/humanize/compare/4.8.0...4.9.0)

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

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

requirements.txt

@@ -55,7 +55,7 @@ h11==0.14.0
 html2text==2020.1.16
 html5lib==1.1
 humanfriendly==10.0
-humanize==4.8.0
+humanize==4.9.0
 idna==3.4
 itsdangerous==2.1.2
 Jinja2==3.1.2