v0.30.0

What's Changed

• document and simplify by @walteh in #7
• fix auto bump problem by @walteh in #8
• adding logging to the head pull by @walteh in #9
• actually refer to the logging by @walteh in #10
• contains func by @walteh in #11
• bump ref of action by @walteh in #12

Full Changelog: v0.20.0...v0.30.0