Add github action file to create the pypi wheels on push

cheers @EwoutH your work is very useful to me :D

.github/workflows/publish.yml

@@ -0,0 +1,50 @@
+name: Publish Python bindings
+
+on:
+ release:
+  types: [created]
+
+jobs:
+  linux:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - uses: messense/maturin-action@v1
+      with:
+        maturin-version: latest
+        manylinux: auto
+        command: publish
+        args: --no-sdist -u hledoux -p ${{ secrets.PASSWORD_PYPI }}
+
+  windows:
+    runs-on: windows-latest
+    steps:
+    - uses: actions/checkout@v2
+    - uses: messense/maturin-action@v1
+      with:
+        maturin-version: latest
+        command: publish
+        args: --no-sdist -u hledoux -p ${{ secrets.PASSWORD_PYPI }}
+
+  macos:
+    runs-on: macos-latest
+    strategy:
+      matrix:
+        python-version: ["3.7", "3.8", "3.9", "3.10"]
+      fail-fast: false
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v2
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: Install aarch64-apple-darwin toolchain
+      uses: actions-rs/toolchain@v1
+      with:
+        toolchain: stable
+        target: aarch64-apple-darwin
+    - uses: messense/maturin-action@v1
+      with:
+        maturin-version: latest
+        command: publish
+        args: -i python --no-sdist --universal2 -u hledoux -p ${{ secrets.PASSWORD_PYPI }}