[NonGNU ELPA] Helm-Core version 3.8.8

[ELPA update]

Version 3.8.8 of package Helm-Core has just been released in NonGNU ELPA.
You can now find it in M-x package-list RET.

Helm-Core describes itself as:
  Development files for Helm

More at https://elpa.nongnu.org/nongnu/helm-core.html