useLoop doesn't yoyo properly

[wcandillon]

When using useLoop() with yoyo: true, has one faulty frame. This can be seen on the breathe example that flickers one frame on each frame. By logging the values we:

 LOG  0.976
 LOG  0.984
 LOG  0.992
 LOG  1
 LOG  0 // this is the issue
 LOG  0.9915
 LOG  0.983
 LOG  0.975

[chrfalch]

This will be fixed with #193.