chore: improve prerelease handling (#39)

Author: notnmeyer

.goreleaser.yaml

@@ -37,6 +37,7 @@ archives:
 
 homebrew_casks:
   - name: loops
+    skip_upload: auto
     alternative_names:
       - loops@{{ .Version }}
     repository:
@@ -54,5 +55,8 @@ homebrew_casks:
             system_command "/usr/bin/xattr", args: ["-dr", "com.apple.quarantine", "#{staged_path}/loops"]
           end
 
+release:
+  prerelease: auto
+
 changelog:
   use: github-native