ci: add LLVM version to the matrix

Author: tiennou

.github/workflows/main.yml

@@ -13,9 +13,10 @@ jobs:
       fail-fast: false
       matrix:
         ruby: [head, 3.0, 2.7, 2.6]
+        llvm: ["6.0", 7, 8, 9, 10]
         os: [ ubuntu-18.04, macos-latest ]
 
-    name: Ruby ${{ matrix.ruby }} on ${{ matrix.os }}
+    name: Ruby ${{ matrix.ruby }} / LLVM ${{ matrix.llvm }} on ${{ matrix.os }}
     runs-on: ${{ matrix.os }}
     continue-on-error: ${{ endsWith(matrix.ruby, 'head') || matrix.ruby == 'debug' }}
 
@@ -25,13 +26,13 @@ jobs:
         if: runner.os == 'Linux'
         run: |
           sudo apt update
-          sudo apt install -y libclang-6.0-dev llvm-6.0 clang-6.0
+          sudo apt install -y libclang-${{ matrix.llvm }}-dev llvm-${{ matrix.llvm }} clang-${{ matrix.llvm }}
       - name: Set up Ruby ${{ matrix.ruby }}
         uses: ruby/setup-ruby@v1
         with:
           ruby-version: ${{ matrix.ruby }}
           bundler-cache: true
       - name: Run tests
         run: |
-          [ -x /usr/bin/llvm-config-6.0 ] && export LLVM_CONFIG=llvm-config-6.0
+          [ -x /usr/bin/llvm-config-${{ matrix.llvm }} ] && export LLVM_CONFIG=llvm-config-${{ matrix.llvm }}
           bundle exec rake