Add 'release' GitHub Actions workflow

.github/workflows/release.yml

@@ -0,0 +1,21 @@
+---
+name: Release
+
+on:
+  push:
+    tags:
+      - "v*"
+jobs:
+  release:
+    name: Release
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@master
+
+      - name: goreleaser
+        uses: docker://goreleaser/goreleaser
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          args: --release-notes CHANGELOG.md release
+        if: success()

.gitignore

@@ -1,2 +1,3 @@
 /s3enum
 /vendor
+/dist

.goreleaser.yml

@@ -0,0 +1,34 @@
+---
+before:
+  hooks:
+    - go mod download
+
+builds:
+  - env:
+      - CGO_ENABLED=0
+
+archives:
+  - replacements:
+      darwin: Darwin
+      linux: Linux
+      windows: Windows
+      386: i386
+      amd64: x86_64
+
+    files:
+      - LICENSE
+      - README.md
+      - CHANGELOG.md
+
+checksum:
+  name_template: "checksums.txt"
+
+snapshot:
+  name_template: "{{ .Tag }}-next"
+
+changelog:
+  sort: asc
+  filters:
+    exclude:
+      - "^docs:"
+      - "^test:"