18.6.0

• bugfix: PhysicsCharacter disregards ignore lists
• Deprecated the PhysicsSpace.countCollisionListeners() method.
• Optimized PhysicsSpace.onContactProcessed() and onContactStarted() to create event objects only when listeners are registered.
• Added 3 math methods:
  • FastMath.atan()
  • MyMath.log2()
  • MyMath.maxInt()
• Updated the Bullet source code to match SHA1 ID=6bb8d112 of the bullet3 project.
• Build MacOSX_ARM64 natives for release using Xcode 14.2 .