fix: completion from install formula

.goreleaser.yml

@@ -41,18 +41,9 @@ brews:
     homepage: https://cli.auth0.com
     description: Auth0 CLI
     install: |
-      bin.install "auth0"
-      rm Dir["#{bin}/{auth0-completion.bash,auth0-completion.zsh}"]
-      system bin/"auth0", "completion", "bash"
-      system bin/"auth0", "completion", "zsh"
-      bash_completion.install "auth0-completion.bash"
-      zsh_completion.install "auth0-completion.zsh"
-      (zsh_completion/"_auth0").write <<~EOS
-        #compdef auth0 
-        _auth0 () {
-          local e
-          e=$(dirname ${funcsourcetrace[1]%:*})/auth0-completion.zsh
-          if [[ -f $e ]]; then source $e; fi
-        }
-       EOS
+        bin.install "auth0"
+
+        (bash_completion/"auth0").write `#{bin}/auth0 completion bash`
+        (fish_completion/"auth0.fish").write `#{bin}/auth0 completion fish`
+        (zsh_completion/"_auth0").write `#{bin}/auth0 completion zsh`
     caveats: "Thanks for installing Auth0 CLI"