v0.3.1 official release with python package

What's Changed

• Prevent sign_flip from overflowing in the Chebyshev grid calculation by @pavel-po in #1
• set cmake policy CMP0144 by @iskakoff in #3
• switchin to Github hosted runners by @iskakoff in #4
• Enforce higher version for cmake by @gauravharsha in #5
• using CMAKE_CURRENT_SOURCE_DIR instead of CMAKE_SOURCE_DIR so cmake f… by @egull in #6
• Iskakov/ir grid fix by @iskakoff in #9
• Pypi package for green-grids by @gauravharsha in #8

New Contributors

• @pavel-po made their first contribution in #1
• @iskakoff made their first contribution in #3
• @gauravharsha made their first contribution in #5
• @egull made their first contribution in #6

Full Changelog: v0.2.4...v0.3.0