CI: bump setup-dlang to v2

Signed-off-by: Andrei Horodniceanu <a.horodniceanu@proton.me>

Author: the-horo

.github/workflows/main.yml

@@ -18,21 +18,20 @@ jobs:
     runs-on: ${{ matrix.os }}
     timeout-minutes: 10
     env:
-      DMD: ${{ startsWith(matrix.dc, 'ldc') && 'ldmd2' || 'dmd' }}
       N: ${{ startsWith(matrix.os, 'macos') && '3' || '2' }}
     steps:
       - uses: actions/checkout@v4
       - name: Install D compiler
-        uses: dlang-community/setup-dlang@v1.3.0
+        uses: dlang-community/setup-dlang@v2
         with:
           compiler: ${{ matrix.dc }}
       - name: Build
         shell: bash
-        run: make -j$N DMD=$DMD
+        run: make -j$N DMD="$DMD"
       - name: Test
         shell: bash
-        run: make -j$N DMD=$DMD test
+        run: make -j$N DMD="$DMD" test
       - name: 'Windows: Build and test with MODEL=32'
         if: runner.os == 'Windows'
         shell: bash
-        run: make -j$N DMD=$DMD MODEL=32 all test
+        run: make -j$N DMD="$DMD" MODEL=32 all test