Upgrading Python setup

What's Changed

• Various minor upgrades by @tdegeus in #38
• docs: switching to furo by @tdegeus in #39
• Removing incorrect header by @tdegeus in #41
• Updating setup by @tdegeus in #42
• Minor documentation updates by @tdegeus in #43
• Upgrading CI by @tdegeus in #44

Full Changelog: v1.4.4...v1.4.5