test: check windows build

run `cargo check` for the x86_64-pc-windows-gnu target, to ensure we
don't accidentally break building the crate on windows.

Signed-off-by: Patrick Roy <[email protected]>

Author: roypat

.buildkite/custom-tests.json

@@ -56,6 +56,13 @@
         "x86_64",
         "aarch64"
       ]
+    },
+    {
+      "test_name": "check-windows-build",
+      "command": "RUSTFLAGS=\"-D warnings\" cargo check --all-targets  --features 'backend-bitmap backend-mmap backend-atomic' --workspace --target x86_64-pc-windows-gnu",
+      "platform": [
+        "x86_64"
+      ]
     }
   ]
 }