Using "after" function makes "stop" function fail

[lmfff]

Hi! Not sure you're still maintaining this repo but I'm using it and found this issue. This code:

t = tick.delay(function() print("cat") end, 1)
  :after(function() print("dog") end, 1)
t:stop()

seems to cause t:stop() to fail and t to be executed anyways.

Thanks!

[lmfff]

This syntax solves the issue

t = tick.delay(function() print("cat") end, 1)
t:after(function() print("dog") end, 1)
t:stop()