Test more cases on Windows

Author: mlocati

.github/workflows/tests.yml

@@ -47,9 +47,11 @@ jobs:
           - "8.2"
         include:
           - os: windows-latest
-            php-version: "5.5"
+            php-version: "5.6"
           - os: windows-latest
             php-version: "7.4"
+          - os: windows-latest
+            php-version: "8.1"
     runs-on: ${{ matrix.os }}
     steps:
       - name: Setup PHP