Serialbox version 2.6.3

Cleanups

• Remove STELLA by @havogt in #277

Deployment

• Add bump-my-version by @havogt in #279
• Deploy action by @havogt in #280
• Add CI deployment workflows by @havogt in #281
• Enable deploy workflow by @havogt in #282
• Linux arm wheels by @havogt in #283

Full Changelog: v2.6.2...v2.6.3