Update CI configs, add 3.11 support

Author: Secrus

.github/workflows/main.yml

@@ -18,7 +18,7 @@ jobs:
       max-parallel: 4
       matrix:
         os: [Ubuntu, MacOS, Windows]
-        python-version: [3.7, 3.8, 3.9, "3.10"]
+        python-version: [3.7, 3.8, 3.9, "3.10", "3.11-dev"]
 
     defaults:
       run:
@@ -28,7 +28,7 @@ jobs:
       - uses: actions/checkout@v3
 
       - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v3
+        uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.python-version }}
 
@@ -61,13 +61,25 @@ jobs:
           key: venv-${{ runner.os }}-${{ steps.full-python-version.outputs.version }}-${{ hashFiles('**/poetry.lock') }}
 
       - name: Ensure cache is healthy
-        if: steps.cache.outputs.cache-hit == 'true' && matrix.os != 'MacOS'
-        run: timeout 10s poetry run pip --version || rm -rf .venv
+        if: steps.cache.outputs.cache-hit == 'true'
+        run: |
+          # `timeout` is not available on macOS, so we define a custom function.
+          [ "$(command -v timeout)" ] || function timeout() { perl -e 'alarm shift; exec @ARGV' "$@"; }
+          # Using `timeout` is a safeguard against the Poetry command hanging for some reason.
+          timeout 10s poetry run pip --version || rm -rf .venv
+
+      # XXX: https://github.com/pypa/pip/issues/11352 causes random failures -- remove once fixed in a release.
+      - name: Upgrade pip on 3.11 for macOS
+        if: ${{ matrix.python-version == '3.11-dev' && matrix.os == 'macOS' }}
+        run: poetry run pip install git+https://github.com/pypa/pip.git@fbb7f0b293f1d9289d8c76a556540325b9a172b2
 
       - name: Install dependencies
         shell: bash
         run: poetry install
 
+      - name: Run mypy
+        run: poetry run mypy
+
       - name: Run pytest
         shell: bash
         run: poetry run pytest -v tests

.github/workflows/release.yml

@@ -9,23 +9,30 @@ jobs:
   release:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
+
     - name: Get tag
       id: tag
       run: |
         echo ::set-output name=tag::${GITHUB_REF#refs/tags/}
+
     - name: Set up Python 3.7
-      uses: actions/setup-python@v1
+      uses: actions/setup-python@v4
       with:
         python-version: 3.7
+
     - name: Install dependencies
-      run: python -m pip install --upgrade pip poetry --pre
+      run: python -m pip install --upgrade pip poetry
+
+    - name: Build project
+      run: poetry build
+
     - name: Publish release to PyPI
       env:
         POETRY_PYPI_TOKEN_PYPI: ${{ secrets.PYPI_API_TOKEN }}
       run: |
-        poetry build
         poetry publish
+
     - name: Create Release
       id: create_release
       uses: actions/create-release@v1