CI: update action versions; update wheel workflow

.github/workflows/main.yml

@@ -20,10 +20,10 @@ jobs:
       fail-fast: false
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
 
       - name: Set up Python 3.9
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v5
         with:
           python-version: 3.9
 
@@ -45,33 +45,25 @@ jobs:
           cython-lint src/pykrige/
 
   build_wheels:
-    name: wheels for ${{ matrix.cfg.os }} / ${{ matrix.cfg.arch }}
-    runs-on: ${{ matrix.cfg.os }}
+    name: wheels for ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
       matrix:
-        cfg:
-        - { os: ubuntu-latest, arch: x86_64 }
-        - { os: ubuntu-latest, arch: i686 }
-        - { os: windows-latest, arch: AMD64 }
-        - { os: windows-latest, arch: x86 }
-        - { os: macos-latest, arch: x86_64 }
-        - { os: macos-latest, arch: arm64 }
-        - { os: macos-latest, arch: universal2 }
+        # macos-13 is an intel runner, macos-14 is apple silicon
+        os: [ubuntu-latest, windows-latest, macos-13, macos-14]
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
         with:
           fetch-depth: '0'
 
       - name: Build wheels
-        uses: pypa/[email protected]
-        env:
-          CIBW_ARCHS: ${{ matrix.cfg.arch }}
+        uses: pypa/[email protected]
         with:
           output-dir: dist
 
-      - uses: actions/upload-artifact@v2
+      - uses: actions/upload-artifact@v3
         with:
           path: ./dist/*.whl
 
@@ -80,12 +72,12 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
         with:
           fetch-depth: '0'
 
       - name: Set up Python 3.9
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v5
         with:
           python-version: 3.9
 
@@ -107,7 +99,7 @@ jobs:
           # PEP 517 package builder from pypa
           python -m build --sdist --outdir dist .
 
-      - uses: actions/upload-artifact@v2
+      - uses: actions/upload-artifact@v3
         with:
           path: dist/*.tar.gz