[NonGNU ELPA] Geiser-Racket version 0.16

[ELPA update]

Version 0.16 of package Geiser-Racket has just been released in NonGNU ELPA.
You can now find it in M-x package-list RET.

Geiser-Racket describes itself as:
  Support for Racket in Geiser

More at https://elpa.nongnu.org/nongnu/geiser-racket.html