Update GitHub actions

Drop Python 2.7, as it is no longer available:

    Warning: The support for python 2.7 will be removed on June 19. Related issue: actions/setup-python#672
    Version 2.7 was not found in the local cache
    Error: The version '2.7' with architecture 'x64' was not found for Ubuntu 22.04.
    The list of all available versions can be found here: https://raw.githubusercontent.com/actions/python-versions/main/versions-manifest.json

Add Python 3.12 as its support was just added.

Fork macOS steps from Linux due to the ARM arch change:

- Rust 1.41 does not have a `aarch64-apple-darwin` version. The first Rust
  version that supports `aarch64-apple-darwin` is 1.49.0.
- Python 3.7 to 3.10 do not have a macOS ARM version.

.github/workflows/test.yml

@@ -7,13 +7,13 @@ on:
     branches: [ master ]
 
 jobs:
-  unix:
+  linux:
     runs-on: ${{ matrix.os }}
 
     strategy:
       matrix:
-        os: [ ubuntu-latest, macos-latest ]
-        py: [ "2.7", "3.7", "3.8", "3.9", "3.10", "3.11" ]
+        os: [ ubuntu-latest ]
+        py: [ "3.7", "3.8", "3.9", "3.10", "3.11", "3.12" ]
         rust: [ "1.41.1", "stable", "nightly" ]
 
     steps:
@@ -44,13 +44,50 @@ jobs:
       run: |
         make test extensions
 
+  macos:
+    runs-on: ${{ matrix.os }}
+
+    strategy:
+      matrix:
+        os: [ macos-latest ]
+        py: [ "3.11", "3.12" ]
+        rust: [ "1.49.0", "stable", "nightly" ]
+
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v3
+    - name: Setup Python ${{ matrix.py }}
+      uses: actions/setup-python@v4
+      with:
+        python-version: ${{ matrix.py }}
+    - name: Setup Rust ${{ matrix.rust }}
+      uses: dtolnay/rust-toolchain@master
+      with:
+        toolchain: ${{ matrix.rust }}
+    - name: Check versions and paths
+      run: |
+        python -V ; rustc -V
+        echo "PATH=$PATH"
+        echo "LD_LIBRARY_PATH=$LD_LIBRARY_PATH"
+        echo "LIBRARY_PATH=$LIBRARY_PATH"
+        PYTHON_LIB=$(python -c "import sysconfig; print(sysconfig.get_config_var('LIBDIR'))")
+        echo "PYTHON_LIB=$PYTHON_LIB"
+        echo "LIBRARY_PATH=$LIBRARY_PATH:$PYTHON_LIB" >> "$GITHUB_ENV"
+    - name: Remove Cargo.lock
+      if: ${{ matrix.rust == 'stable' || matrix.rust == 'nightly' }}
+      run: |
+        rm Cargo.lock
+    - name: Build and test
+      run: |
+        make test extensions
+
   windows:
     runs-on: ${{ matrix.os }}
 
     strategy:
       matrix:
         os: [ windows-latest ]
-        py: [ "2.7", "3.7", "3.8", "3.9", "3.10", "3.11"]
+        py: [ "3.7", "3.8", "3.9", "3.10", "3.11", "3.12" ]
         rust: [ "1.41.1", "stable" ]
 
     steps: