ci: integrate test and release jobs into one

.github/workflows/ci.yml

@@ -4,6 +4,8 @@ on:
   push:
     branches:
       - main
+    tags:
+      - 'v*.*.*'
     paths-ignore:
       - '**.md'
   pull_request:
@@ -52,3 +54,23 @@ jobs:
       - run: mage install
       - run: tss version
       - run: tss -h
+
+  release:
+    runs-on: ubuntu-18.04
+    needs: test
+    if: ${{ startsWith(github.ref, 'refs/tags/') }}
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+
+      # https://github.com/peaceiris/workflows/blob/main/setup-goreleaser/action.yml
+      - uses: peaceiris/workflows/setup-goreleaser@v0.8.1
+
+      - name: goreleaser release
+        env:
+          GITHUB_TOKEN: ${{ secrets.GH_PAT }}
+        run: |
+          TAG_NAME="${GITHUB_REF##refs/tags/}"
+          RELEASE_NOTES="See [CHANGELOG.md](https://github.com/${GITHUB_REPOSITORY}/blob/${TAG_NAME}/CHANGELOG.md) for more details."
+          goreleaser release --rm-dist --release-notes <(echo ${RELEASE_NOTES})