Minor release 1.4.0

What's Changed

• Bugfix memory test by @Gamenot in #2081
• Performance Optimizations by @saulfield in #2083
• Update panda3d for python 3.10 by @Gamenot in #2080
• Update examples by @Gamenot in #2079

Full Changelog: v1.3.0...v1.4.0