heroku: add README (#7342)

4c8dd9c2 · Erwan ROUSSEL · Marc Cornellà · ad9a8f2d · 4c8dd9c2
Commit 4c8dd9c2 authored Oct 26, 2018 by Erwan ROUSSEL Committed by Marc Cornellà Oct 26, 2018
--- a/plugins/heroku/README.md
+++ b/plugins/heroku/README.md
+# Heroku
+
+This plugin provides completion for the [Heroku CLI](https://devcenter.heroku.com/articles/heroku-cli).
+
+To use it add heroku to the plugins array in your zshrc file:
+
+```bash
+plugins=(... heroku)
+```