v0.6.3

Clipper v0.6.3

Diff since v0.6.0

Closed issues:

• TagBot trigger issue (#40)

Merged pull requests:

• add simplify poly and upgrade to 6.4.2 (#39) (@SimonDanisch)
• Added functions for Minkowski sum and difference (#44) (@plut)
• [CI] update to GHA (#45) (@sjkelly)
• set min julia to 1.4 (#46) (@sjkelly)
• documentation for offsetting (#47) (@Wikunia)