XRFeitoria Release v0.6.3

What's Changed

• [Fix] Bug of multi-threading by @HaiyiMei in #30
• [CI] Add CircleCI Pipelines by @HaiyiMei in #33
• [Version] Bump version to v0.6.3 by @HaiyiMei in #34 #37

Full Changelog: v0.6.2...v0.6.3