Add publishing workflow

.github/workflows/main.yml

@@ -0,0 +1,39 @@
+name: CI
+
+on:
+  pull_request:
+  push:
+    # Run CI on all branch pushes. Must use this syntax,
+    # as we also need to run CI on tag pushes.
+    branches:
+      - "**"
+    tags:
+      - v[0-9]+.[0-9]+.[0-9]+*
+
+jobs:
+  build:
+    name: Build, lint, and publish
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out the repository
+        uses: actions/checkout@v3
+
+      - name: Set up Node environment
+        uses: actions/setup-node@v3
+        with:
+          node-version: '16'
+          cache: yarn
+
+      - name: Create a production build
+        run: yarn build
+
+      - name: Get the publishing version number
+        id: version-number
+        run: echo "::set-output name=version::$(git describe --tags | tail -c +2)"
+        if: startsWith(github.ref, 'refs/tags/')
+
+      - name: Publish the package
+        run: yarn publish --new-version ${{ steps.version-number.outputs.version }} --non-interactive --no-git-tag-version
+        env:
+          NPM_AUTH_TOKEN: ${{ secrets.NPM_AUTH_TOKEN }}
+        if: startsWith(github.ref, 'refs/tags/')