feat: Enforce Python 3.8+ requirement and add multi-version CI testing#440

Iamrodos wants to merge 3 commits into

josegonzalez:masterjosegonzalez/python-github-backup:masterfrom

Iamrodos:feat/python-version-requirementsIamrodos/python-github-backup:feat/python-version-requirementsCopy head branch name to clipboard