ci: Change setting to exclude DMD on macOS-latest

And a few minor fixes that are inconsequential.

Author: Geod24

.github/workflows/ci.yml

@@ -12,20 +12,20 @@ jobs:
     name: "[${{ matrix.os }} | ${{ matrix.dc }}]"
     strategy:
       matrix:
-        os: [ubuntu-latest, windows-latest, macOS-latest]
+        os: [ubuntu-latest, windows-latest]
         dc: [dmd-latest, ldc-latest]
-        arch: [x86_64]
+        include:
+            # No support for Apple Silicon from DMD at this time
+            - { os: macOS-latest, dc: ldc-latest }
     runs-on: ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@v3
-
+      - uses: actions/checkout@v4
       - name: Install D compiler
         uses: dlang-community/setup-dlang@v1
         with:
           compiler: ${{ matrix.dc }}
       - name: Run tests
         env:
           DC: ${{matrix.dc}}
-          ARCH: ${{matrix.arch}}
         run: |
           dub test