Version bump

[danigm]

It's time for a new release

See #212

Changelog:
0.9.1:

• Don't crash on missing urls
• fix: sanitize summary only if it exists
• Use platformdirs module to find template directory paths.
• fix bug: AttributeError: 'Namespace' object has no attribute 'localfile' for fetch command
• Use build.project_wheel_metadata to extract metadata
• Fix no esp variable (utils.py)
• Fix new argument access and tests
• Add ability to generate .spec files from local PKG-INFO file
• Support project.urls.Repository to get homepage
• Replace deprecated PyPI XML API with Simple API
• close all connections: replace urllib with requests
• remove pkg_resources
• Migrate update spdx command from setuptools hook to hatch script, execute
• Migrate spdx file from pickle to json
• Switch from setuptools+pbr to hatch