chore: test github workflow

Author: lindsaylevine

.github/workflows/test.yml

@@ -0,0 +1,40 @@
+name: Plugin Tests
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}
+
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macOS-latest, windows-latest]
+        node-version: [12, '*']
+        exclude:
+          - os: macOS-latest
+            node-version: 12
+          - os: windows-latest
+            node-version: 12
+      fail-fast: false
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Use Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v2
+        with:
+          node-version: ${{ matrix.node-version }}
+          check-latest: true
+      - name: NPM Install
+        run: npm ci
+      - name: Linting
+        run: npm run format:ci
+        if: "${{ matrix.node-version == '*' }}"
+      - name: Run tests against next@latest
+        run: npm test
+      - name: Install Next.js Canary
+        run: npm install -D next@canary --legacy-peer-deps
+      - name: Run tests against next@canary
+        run: npm test