add github actions badge

Author: patrickdevivo

README.md

@@ -1,5 +1,7 @@
 [![GoDoc](https://godoc.org/github.com/augmentable-dev/tickgit?status.svg)](https://godoc.org/github.com/augmentable-dev/tickgit)
 
+[![BuildStatus](https://github.com/augmentable-dev/tickgit/workflows/Test/badge.svg)](https://github.com/augmentable-dev/tickgit/actions?workflow=Test)
+
 ## tickgit 🎟️
 
 Tickets as config. Manage your repository's tickets and todo items as configuration files in your codebase. Use the `tickgit` command to view a snapshot of pending items, summaries of completed items, and historical reports of progress using `git` history.