add release workflow

.github/workflows/release.yml

@@ -0,0 +1,28 @@
+name: Perform Release
+on:
+  push:
+    tags:
+      - '*'
+jobs:
+  deploy-crate:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up Node
+        uses: actions/setup-node@v2
+        with:
+          node-version: 16
+          cache: npm
+      - name: Install dependencies
+        run: npm install
+      - name: Compile grammar
+        run: npm run generate
+      - name: Set up Rust
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+      - name: Publish to crates.io
+        uses: actions-rs/cargo@v1
+        with:
+          command: publish
+          args: --token ${{ secrets.CRATES_IO_TOKEN }}

.github/workflows/verify.yml

@@ -11,10 +11,14 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - uses: actions/setup-node@v2
+      - name: Set up Node
+        uses: actions/setup-node@v2
         with:
           node-version: 16
           cache: npm
-      - run: npm install
-      - run: npm run generate
-      - run: npm run test
+      - name: Install dependencies
+        run: npm install
+      - name: Compile grammar
+        run: npm run generate
+      - name: Run all tests
+        run: npm run test

.gitignore

@@ -1,3 +1,4 @@
 .idea/
 node_modules/
 build/
+target/