goreleaser upgrades

Author: mattfenwick

.goreleaser.yml

@@ -1,3 +1,4 @@
+version: 2
 project_name: cyclonus
 release:
   github:

docs/developer-guide.md

@@ -58,11 +58,11 @@ You'll need to be logged in to dockerhub from the command line, in order to push
 Cut a release:
 
 ```bash
-goreleaser release --rm-dist
+goreleaser release --clean
 ```
 
 Make a test release:
 
 ```bash
-goreleaser release --snapshot --rm-dist
+goreleaser release --snapshot --clean
 ```