Release build (v0.3.21)

What's Changed

• Bump peter-evans/create-pull-request from 6.0.2 to 6.0.3 by @dependabot in #133
• dependabot: group action patches by @vintagesucks in #138
• Bump the actions-patch group with 2 updates by @dependabot in #139
• Bump ImageMagick to 7.1.1-31 by @vintagesucks in #140

Full Changelog: v0.3.20...v0.3.21