Add lgtm badge

README.md

@@ -4,5 +4,6 @@ Disgoman is a command handler for DiscordGo, inspired by [Anpan](https://github.
 ## Status
 [![Go Report Card](https://goreportcard.com/badge/github.com/dustinpianalto/disgoman)](https://goreportcard.com/report/github.com/dustinpianalto/disgoman)
 [![GoDoc](https://godoc.org/github.com/dustinpianalto/disgoman?status.svg)](https://godoc.org/github.com/dustinpianalto/disgoman)
+[![Total alerts](https://img.shields.io/lgtm/alerts/g/dustinpianalto/disgoman.svg?logo=lgtm&logoWidth=18)](https://lgtm.com/projects/g/dustinpianalto/disgoman/alerts/)
 
 ##