ci: fix msrv job (#13)

* ci: fix msrv job

* ci: bump jobs to use 3.13 by default

* use tomllib

* just use `cargo add` to set MSRV versions

Author: davidhewitt

.github/workflows/ci.yml

@@ -18,7 +18,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-python@v5
         with:
-          python-version: "3.10"
+          python-version: "3.13"
       - run: pip install black==24.10.0
       - uses: dtolnay/rust-toolchain@stable
         with:
@@ -47,15 +47,7 @@ jobs:
       fail-fast: false # If one platform fails, allow the rest to keep testing.
       matrix:
         rust: [stable]
-        python-version:
-          [
-            "3.9",
-            "3.10",
-            "3.11",
-            "3.12",
-            "3.13",
-            "pypy-3.9",
-          ]
+        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13", "pypy-3.9"]
         platform:
           [
             {
@@ -86,7 +78,7 @@ jobs:
         include:
           # Test minimal supported Rust version
           - rust: 1.63.0
-            python-version: "3.10"
+            python-version: "3.13"
             platform:
               {
                 os: "ubuntu-latest",
@@ -122,27 +114,28 @@ jobs:
           toolchain: ${{ matrix.rust }}
           target: ${{ matrix.platform.rust-target }}
 
-      # - if: matrix.platform.os == 'ubuntu-latest'
-      #   name: Prepare LD_LIBRARY_PATH (Ubuntu only)
-      #   run: echo LD_LIBRARY_PATH=${pythonLocation}/lib >> $GIHUB_ENV
+      - if: ${{ matrix.msrv == 'MSRV' }}
+        name: Set MSRV dependencies
+        run: |
+          cargo add tokio@=1.38.1
 
       - name: Build (no features)
         run: cargo build --no-default-features --verbose --target ${{ matrix.platform.rust-target }}
 
       - name: Build
         run: cargo build --features=${{env.features}} --verbose --target ${{ matrix.platform.rust-target }}
 
-      # uvloop doesn't compile under Windows, Python 3.11-dev, and PyPy
-      - if: ${{ matrix.platform.os != 'windows-latest' && matrix.python-version != '3.11-dev' && !startsWith(matrix.python-version, 'pypy') }}
+      # uvloop doesn't compile under Windows and PyPy
+      - if: ${{ matrix.platform.os != 'windows-latest' && !startsWith(matrix.python-version, 'pypy') }}
         name: Install pyo3-asyncio test dependencies
         run: |
           python -m pip install -U uvloop
 
-      - if: ${{ matrix.msrv != 'MSRV' && matrix.python-version != '3.11-dev' && !startsWith(matrix.python-version, 'pypy') }}
+      - if: ${{ matrix.msrv != 'MSRV' && !startsWith(matrix.python-version, 'pypy') }}
         name: Test
         run: cargo test --all-features --target ${{ matrix.platform.rust-target }}
 
-      - if: ${{ matrix.msrv == 'MSRV' && matrix.python-version != '3.11-dev' && !startsWith(matrix.python-version, 'pypy') }}
+      - if: ${{ matrix.msrv == 'MSRV' && !startsWith(matrix.python-version, 'pypy') }}
         name: Test (MSRV, --no-default-features)
         run: cargo test --no-default-features --features tokio-runtime,async-std-runtime,attributes,unstable-streams --target ${{ matrix.platform.rust-target }}