update tests

Author: Awilum

.github/workflows/tests.yml

@@ -10,7 +10,7 @@ jobs:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
         php: ['7.4', '8.0', '8.1']
-        dependency-version: [prefer-lowest, prefer-stable]
+        dependency-version: [prefer-stable]
 
     steps:
     - uses: actions/checkout@v2