test building wheels to avoid surprises at release time

.github/workflows/build-wheels.yml

@@ -0,0 +1,26 @@
+name: Build wheels
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  build:
+
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macOS-latest, windows-latest]
+
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v2
+    - name: Build wheels
+      uses: messense/maturin-action@v1
+      with:
+        maturin-version: latest
+        manylinux: auto
+        command: build
+        args: --release