chore(ci): add Homebrew installation instructions and configure Homebrew tap

Author: imfing

.goreleaser.yaml

@@ -45,6 +45,21 @@ release:
     owner: imfing
     name: diffs-cli
 
+brews:
+  - name: diffs
+    repository:
+      owner: imfing
+      name: homebrew-tap
+      token: "{{ .Env.HOMEBREW_TAP_GITHUB_TOKEN }}"
+    directory: Formula
+    homepage: "https://github.com/imfing/diffs-cli"
+    description: "Fast, beautiful diffs on the Go"
+    license: "Apache-2.0"
+    install: |
+      bin.install "diffs"
+    test: |
+      assert_match "Review local diffs", shell_output("#{bin}/diffs --help")
+
 snapshot:
   version_template: "{{ incpatch .Version }}-next"
 

README.md

@@ -21,6 +21,13 @@ Fast, beautiful diffs on the Go.
 
 Download a pre-built binary from the [releases page](https://github.com/imfing/diffs-cli/releases), or build from source.
 
+Install with Homebrew:
+
+```sh
+brew tap imfing/tap
+brew install diffs
+```
+
 Run from any git repository:
 
 ```sh