[NonGNU ELPA] Sass-Mode version 3.0.16

[ELPA update]

Version 3.0.16 of package Sass-Mode has just been released in NonGNU ELPA.
You can now find it in M-x package-list RET.

Sass-Mode describes itself as:
  Major mode for editing Sass files

More at https://elpa.nongnu.org/nongnu/sass-mode.html