Add release workflow

.github/workflows/release.yml

@@ -0,0 +1,49 @@
+name: Binaryen.ml Release w/ Archive
+on:
+  push:
+    tags:
+      - '*'
+
+jobs:
+  build:
+    name: Create Release
+    runs-on: macos-latest
+    steps:
+      - name: Install git-archive-all
+        run: |
+          brew install git-archive-all
+
+      - uses: olegtarasov/get-tag@v2
+        id: tag_name
+
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Build archive
+        run: |
+          git-archive-all --force-submodules binaryen-archive.tar.gz
+
+      - name: Create release
+        id: create_release
+        uses: actions/create-release@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          tag_name: ${{ github.ref }}
+          release_name: ${{ steps.tag_name.outputs.tag }}
+          body: |
+            Changes in this Release
+            - FILL OUT CHANGES HERE
+          draft: true
+          prerelease: ${{ !startsWith(steps.tag_name.outputs.tag, 'v') }}
+
+      - name: Upload Release Asset
+        id: upload-release-asset
+        uses: actions/upload-release-asset@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          upload_url: ${{ steps.create_release.outputs.upload_url }}
+          asset_path: ./binaryen-archive.tar.gz
+          asset_name: binaryen-archive-${{ steps.tag_name.outputs.tag }}.tar.gz
+          asset_content_type: application/gzip