ci: run tests on windows

Author: JanTvrdik

.github/workflows/checks.yml

@@ -7,10 +7,11 @@ on:
             - "v[0-9]"
 jobs:
     checks:
-        runs-on: ubuntu-latest
+        runs-on: ${{ matrix.os }}
         strategy:
             fail-fast: false
             matrix:
+                os: [ubuntu-latest, windows-latest]
                 php-version: ['7.4', '8.0', '8.1', '8.2', '8.3', '8.4']
         steps:
             -