Nominating Joshua Casey for Maintainer role

[robdimsdale]

I'd like to nominate @joshuatcasey for the Maintainer role for the python projects. He has made notable contributions to multiple projects and has demonstrated thoughtfulness around the future direction of the projects.

@paketo-buildpacks/python-maintainers
@paketo-buildpacks/steering-committee

[ryanmoran]

Congrats @joshuatcasey on becoming a Python Maintainer!