3.1.1.557

What's Changed

• [upstream] Tunable joint stiffness (box2d #934) (#34) @ikpil
• fix: Add --framework (#33) @VaclavElias
• feat: API Docs + CommentConverter (#32) @VaclavElias
• docs: README.md update (#31) @VaclavElias
• Pr/cast initial overlap 933 (#29) @ikpil
• [upstream] Revolute and prismatic targets (box2d #929) (#27) @ikpil
• refactor: split B2Cores into separate modules for better organization (#26) @ikpil
• added unittest for b2rot (#25) @ikpil
• added b2vec2 test (#24) @ikpil
• Pr/changed b2 validate to debug define (#21) @ikpil
• [upstream] Fixed another shape distance assert (box2d #926) (#20) @ikpil
• [upstream] functions to get and set surface material (box2d #921) (#19) @ikpil

Full Changelog: 3.1.0.510...3.1.1