Migrate to latest GitHub actions

.github/workflows/ci.yml

@@ -15,26 +15,26 @@ jobs:
             publish: true
           - description: macOS / Xcode
             os: macos-10.15
-            cmakeOptions: ""
+            cmakeOptions: ''
             publish: true
           - description: Linux / GCC
             os: ubuntu-20.04
-            cmakeOptions: "-D CMAKE_C_COMPILER=gcc-10 -D CMAKE_CXX_COMPILER=g++-10"
+            cmakeOptions: '-D CMAKE_C_COMPILER=gcc-10 -D CMAKE_CXX_COMPILER=g++-10'
             publish: true
           - description: Linux / Clang
             os: ubuntu-20.04
-            cmakeOptions: "-D CMAKE_C_COMPILER=clang-12 -D CMAKE_CXX_COMPILER=clang++-12"
+            cmakeOptions: '-D CMAKE_C_COMPILER=clang-12 -D CMAKE_CXX_COMPILER=clang++-12'
             publish: false
     env:
       BOOST_ROOT: ${{ github.workspace }}/lib/boost
       BOOST_URL: https://sourceforge.net/projects/boost/files/boost/1.76.0/boost_1_76_0.tar.bz2/download
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
           lfs: true
       - name: Restore Boost from cache
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         id: cache-boost
         with:
           path: ${{ env.BOOST_ROOT }}
@@ -58,7 +58,7 @@ jobs:
           cmake ${{ matrix.cmakeOptions }} ..
           cmake --build . --config Release --target package
       - name: Upload artifacts
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v3
         with:
           name: binaries
           path: build/*.zip
@@ -76,13 +76,13 @@ jobs:
     if: startsWith(github.ref, 'refs/tags/v')
     steps:
       - name: Download artifacts
-        uses: actions/download-artifact@v2
+        uses: actions/download-artifact@v4
         with:
           name: binaries
       - name: Create GitHub release draft
-        uses: softprops/action-gh-release@v1
+        uses: softprops/action-gh-release@v2
         with:
           draft: true
-          files: "*.zip"
+          files: '*.zip'
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}