workflows: add windows, use checkout v4, no submodules.

Only remaining submodule is cmark-gfm, used in spec test.

Author: kivikakk

.github/workflows/zig.yml

@@ -8,9 +8,7 @@ jobs:
   test-linux:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
-        with:
-          submodules: recursive
+      - uses: actions/checkout@v4
       - uses: goto-bus-stop/setup-zig@v2
         with:
           version: 0.12.0
@@ -19,21 +17,26 @@ jobs:
   test-macos:
     runs-on: macos-latest
     steps:
-      - uses: actions/checkout@v3
-        with:
-          submodules: recursive
+      - uses: actions/checkout@v4
       - uses: goto-bus-stop/setup-zig@2a9625d550eefc3a9b1a43d342ad655f563f8241
         with:
           version: 0.12.0
       - run: brew install pcre
       - run: zig build
       - run: zig build test
+  test-windows:
+    runs-on: windows-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: goto-bus-stop/setup-zig@v2
+        with:
+          version: 0.12.0
+      - run: zig build
+      - run: zig build test
   lint:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
-        with:
-          submodules: recursive
+      - uses: actions/checkout@v4
       - uses: goto-bus-stop/setup-zig@v2
         with:
           version: 0.12.0