[NonGNU ELPA] Ws-Butler version 0.6

[ELPA update]

Version 0.6 of package Ws-Butler has just been released in NonGNU ELPA.
You can now find it in M-x package-list RET.

Ws-Butler describes itself as:
  Unobtrusively remove trailing whitespace.

More at https://elpa.nongnu.org/nongnu/ws-butler.html