ci(llvm): update llvm version

Author: Xenira

.github/workflows/build.yml

@@ -84,7 +84,7 @@ jobs:
         os: [ubuntu-latest, macos-latest, windows-latest]
         php: ["8.0", "8.1", "8.2", "8.3", "8.4"]
         rust: [stable, nightly]
-        clang: ["15", "17"]
+        clang: ["18", "19"]
         phpts: [ts, nts]
         exclude:
           # ext-php-rs requires nightly Rust when on Windows.
@@ -96,11 +96,11 @@ jobs:
           - os: ubuntu-latest
             phpts: ts
           - os: macos-latest
-            clang: "17"
+            clang: "18"
           - os: ubuntu-latest
-            clang: "15"
+            clang: "19"
           - os: windows-latest
-            clang: "15"
+            clang: "18"
     env:
       CARGO_TERM_COLOR: always
     steps:
@@ -131,23 +131,20 @@ jobs:
       - name: Cache LLVM and Clang
         id: cache-llvm
         uses: actions/cache@v4
-        # Macos build doesn't work with clang < 18. As a build for version 18 is not available, we skip the setup
-        if: "!contains(matrix.os, 'windows') && !contains(matrix.os, 'macos')"
+        if: "!contains(matrix.os, 'windows')"
         with:
           path: ${{ runner.temp }}/llvm-${{ matrix.clang }}
           key: ${{ matrix.os }}-llvm-${{ matrix.clang }}
       - name: Setup LLVM & Clang
         id: clang
         uses: KyleMayes/install-llvm-action@v2
-        # Macos build doesn't work with clang < 18. As a build for version 18 is not available, we skip the setup
-        if: "!contains(matrix.os, 'windows') && !contains(matrix.os, 'macos')"
+        if: "!contains(matrix.os, 'windows')"
         with:
           version: ${{ matrix.clang }}
           directory: ${{ runner.temp }}/llvm-${{ matrix.clang }}
           cached: ${{ steps.cache-llvm.outputs.cache-hit }}
       - name: Configure Clang
-        # Macos build doesn't work with clang < 18. As a build for version 18 is not available, we skip the setup
-        if: "!contains(matrix.os, 'windows') && !contains(matrix.os, 'macos')"
+        if: "!contains(matrix.os, 'windows')"
         run: |
           echo "LIBCLANG_PATH=${{ runner.temp }}/llvm-${{ matrix.clang }}/lib" >> $GITHUB_ENV
           echo "LLVM_VERSION=${{ steps.clang.outputs.version }}" >> $GITHUB_ENV