CI: Build & deploy only for tags

Author: ymollard

.github/workflows/test_and_distribute.yml

@@ -34,11 +34,11 @@ jobs:
         run: |
           python -m unittest discover
       - name: Build package with Python ${{ env.PYTHON_BUILD_VERSION }}
-        if: ${{ github.event_name == 'push' && matrix.python-version == env.PYTHON_BUILD_VERSION }}
+        if: ${{ github.event_name == 'push' && startsWith(github.ref, 'refs/tags') && matrix.python-version == env.PYTHON_BUILD_VERSION }}
         run: python -m build
       - name: Publish package relying on pypa/gh-action-pypi-publish with Python ${{ env.PYTHON_BUILD_VERSION }}
         uses: pypa/gh-action-pypi-publish@27b31702a0e7fc50959f5ad993c78deac1bdfc29
-        if: ${{ github.event_name == 'push' && matrix.python-version == env.PYTHON_BUILD_VERSION }}
+        if: ${{ github.event_name == 'push' && startsWith(github.ref, 'refs/tags') && matrix.python-version == env.PYTHON_BUILD_VERSION }}
         with:
           user: __token__
           password: ${{ secrets.PYPI_API_TOKEN }}