build: produce a universal binary (amd64+arm64) for macOS

.goreleaser.yml

@@ -23,14 +23,19 @@ builds:
       - "6"
       - "7"
 
+universal_binaries:
+  - replace: false
+
 archives:
   - format: tar.gz
     name_template: |-
-      {{ .ProjectName }}-{{ .Version }}_{{ .Os }}_{{ .Arch }}{{ if .Arm }}v{{ .Arm }}{{ end }}
+      {{ .ProjectName }}-{{ .Version }}_{{ .Os }}_{{ if eq .Arch "all" }}universal{{ else }}{{ .Arch }}{{ end }}{{ if .Arm }}v{{ .Arm }}{{ end }}{{ if not (eq .Amd64 "v1") }}{{ .Amd64 }}{{ end }}
     wrap_in_directory: true
     format_overrides:
       - goos: windows
         format: zip
+    replacements:
+      darwin: macos
 
 checksum:
   name_template: "checksums.txt"