CI: Run also on windows-latest

mrkn · mrkn · commit d24dd4648284 · 2021-03-10T11:31:57.000+09:00
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
@@ -21,6 +21,7 @@ jobs:
         os:
         - ubuntu-20.04
         - macos-latest
+        - windows-latest
         ruby:
         - "3.0"
         - 2.7
