Add a GitHub Action to publish tags to PyPI automatically.

.github/workflows/pypi.yml

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+# SPDX-FileCopyrightText: 2021 The freestyle-hid Authors
+#
+# SPDX-License-Identifier: 0BSD
+
+name: Publish to TestPyPI (and PyPI)
+
+on: push
+
+jobs:
+  build-n-publish:
+    name: Build package and publish on TestPyPI (and PyPI)
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up Python
+      uses: actions/setup-python@v2
+      with:
+        python-version: 3.x
+    - name: Install pypa/build
+      run: |
+        pip install build
+    - name: Build a binary wheel and a source tarball
+      run: |
+        python -m build --sdist --wheel --outdir dist/ .
+    - name: Publish package to TestPyPI
+      if: github.event_name == 'push' && startsWith(github.ref, 'refs/tags')
+      uses: pypa/gh-action-pypi-publish@release/v1
+      with:
+        password: ${{ secrets.TEST_PYPI_API_TOKEN }}
+        repository_url: https://test.pypi.org/legacy/
+    - name: Publish package to PyPI
+      if: github.event_name == 'push' && startsWith(github.ref, 'refs/tags')
+      uses: pypa/gh-action-pypi-publish@release/v1
+      with:
+        password: ${{ secrets.PYPI_API_TOKEN }}

LICENSES/0BSD.txt

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+Copyright (C) YEAR by AUTHOR EMAIL
+
+Permission to use, copy, modify, and/or distribute this software for any purpose with or without fee is hereby granted.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.