workflows: test on 0.13.0.

Author: kivikakk

.github/workflows/spec.yml

@@ -12,5 +12,5 @@ jobs:
           submodules: recursive
       - uses: goto-bus-stop/setup-zig@v2
         with:
-          version: 0.12.0
+          version: 0.13.0
       - run: make spec

.github/workflows/zig.yml

@@ -13,7 +13,7 @@ jobs:
           submodules: recursive
       - uses: goto-bus-stop/setup-zig@v2
         with:
-          version: 0.12.0
+          version: 0.13.0
       - run: zig build
       - run: zig build test
   test-macos:
@@ -24,7 +24,7 @@ jobs:
           submodules: recursive
       - uses: goto-bus-stop/setup-zig@2a9625d550eefc3a9b1a43d342ad655f563f8241
         with:
-          version: 0.12.0
+          version: 0.13.0
       - run: brew install pcre
       - run: zig build
       - run: zig build test
@@ -36,5 +36,5 @@ jobs:
           submodules: recursive
       - uses: goto-bus-stop/setup-zig@v2
         with:
-          version: 0.12.0
+          version: 0.13.0
       - run: zig fmt --check src/*.zig