Minor: fixed a series of bugs, added easing

Fixed a series of issues:

Keyboard input was compromised and no longer working.
Lights body was not properly set.
Added easing functions and looping to the constants.
Fixed camera not setting its body properly.

What's Changed

• fixed issue on keyboard events, renamed CascadingShadowMaps, added ea… by @marco-ponds in #183

Full Changelog: v3.19.0...v3.20.0