updating README.md

Author: Edvin Dunaway

README.md

@@ -1,2 +1,5 @@
 # remove-old-snaps
+
+[![Codacy Badge](https://api.codacy.com/project/badge/Grade/a3c0f3b8cc304a0e9325b69c7d0eb5c7)](https://www.codacy.com/manual/Eddinn/remove-old-snaps?utm_source=github.com&utm_medium=referral&utm_content=eddinn/remove-old-snaps&utm_campaign=Badge_Grade)
+
 Script to remove old versions of updated snaps that are installed on the system