3.0.0-dev.37

• 8e9c1df remove outdated vsync.rst (#2368)
• 8150623 Event loop docs (#2350)
• 0e8403a fixed small issue with sprite size property
• 851821b add .tracking and px -> em conversion (#2365)
• 4ff2f0f add all to InputManger (#2366)
• 895bf57 Version 3.0.0-dev.36 [skip ci]