bug: debug.timeScale doesn't scale dt()

[Granshmeyr]

Describe the bug

debug.timeScale has no effect on dt(). Changing debug.timeScale during runtime will affect nothing.

Version

4000.0.0-alpha.15
and every 3001 version, iirc.

To Reproduce

Steps to reproduce the behavior:

1. Open the confetti example on KAPLAYGROUND
2. Click to spawn particles, note their speed
3. Press F7 / F9 to alter the time scale
4. Click again, note how their speed has not changed

Alternative:

1. Run console.log(dt()) with debug.timeScale value of 1, note the return value
2. Alter the value of debug.timeScale
3. Run console.log(dt()) again, note how the return value is not scaled

Expected behavior

debug.timeScale should scale the return value of dt().