Add GitHub Actions. (#698)

* Add GitHub Actions.

* Fix path.

* Remove minimal configuration (no optional dependencies).

* Disable Windows CI.

* Update codecov action.

* Ignore coverage of templates.

* Remove CircleCI.

* Update changelog.

* Update changelog.

.github/workflows/deploy-pypi.yml

@@ -0,0 +1,18 @@
+name: Publish to PyPI
+
+on:
+  push:
+    tags:
+      - 'v*.*.*'
+
+concurrency:
+  group: "${{ github.workflow }}-${{ github.ref }}"
+  cancel-in-progress: true
+
+jobs:
+  build-and-test-sdist-and-wheels:
+    uses: ./.github/workflows/publish-packages.yml
+    with:
+      upload_to_test: false
+    secrets:
+      PYPI_API_TOKEN: ${{ secrets.PYPI_API_TOKEN }}

.github/workflows/deploy-test-pypi.yml

@@ -0,0 +1,18 @@
+name: Publish to TestPyPI
+
+on:
+  push:
+    branches:
+      - 'release/*.*.*'
+
+concurrency:
+  group: "${{ github.workflow }}-${{ github.ref }}"
+  cancel-in-progress: true
+
+jobs:
+  build-and-test-sdist-and-wheels:
+    uses: ./.github/workflows/publish-packages.yml
+    with:
+      upload_to_test: true
+    secrets:
+      TEST_PYPI_API_TOKEN: ${{ secrets.TEST_PYPI_API_TOKEN }}

.github/workflows/publish-packages.yml

@@ -0,0 +1,72 @@
+name: Publish packages
+
+on:
+  workflow_call:
+    inputs:
+      upload_to_test:
+        required: true
+        type: boolean
+    secrets:
+      TEST_PYPI_API_TOKEN:
+        required: false
+      PYPI_API_TOKEN:
+        required: false
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Check out repo
+      uses: actions/checkout@v3
+      with:
+        submodules: "recursive"
+    - name: Set up Python
+      uses: actions/setup-python@v4
+      with:
+        python-version: "3.11"
+    - name: Install dependencies
+      run: |
+        # We must explicitly install the requirements so that we can force
+        # installation of the local wheel below in case the version conflicts
+        # with published wheels (typically only possible during testing).
+        python -m pip install \
+        -r requirements.txt \
+        -r requirements-test.txt
+    - name: Install pypa/build
+      run:
+        python -m pip install build
+    - name: Build a binary wheel and a source tarball
+      run:
+        python -m build --sdist --wheel --outdir dist/ .
+    - name: Install wheel
+      run:
+        python -m pip install signac-flow --progress-bar off --no-index -f dist/
+    - name: Test with pytest
+      run:
+        python -m pytest -v tests/
+    - name: Upload artifact
+      uses: actions/upload-artifact@v2
+      with:
+          name: release
+          path: dist/
+
+  publish:
+    needs: [build]
+    runs-on: ubuntu-latest
+    steps:
+      - name: Download artifact
+        uses: actions/download-artifact@v2
+        with:
+            name: release
+            path: dist/
+      - name: Publish package to TestPyPI
+        if: ${{ inputs.upload_to_test }}
+        uses: pypa/gh-action-pypi-publish@release/v1
+        with:
+          repository_url: https://test.pypi.org/legacy/
+          password: ${{ secrets.TEST_PYPI_API_TOKEN }}
+      - name: Publish package to PyPI
+        if: ${{ !inputs.upload_to_test }}
+        uses: pypa/gh-action-pypi-publish@release/v1
+        with:
+          password: ${{ secrets.PYPI_API_TOKEN }}