Spine v3.43.1

What's Changed

Other changes

• fix(pkg): keep src. in Python module ids when src/ is a package by @ssmith-synaptixs in #442
• chore(release): cut 3.43.1 by @ssmith-synaptixs in #443
• Release 3.43.1 — Python src/ package imports by @ssmith-synaptixs in #444

Full Changelog: v3.43.0...v3.43.1