Do not peg PySide2 version for binding tests.

Author: fancidev

.github/workflows/tests.yml

@@ -33,9 +33,9 @@ jobs:
       - name: Install Qt dependencies
         if: ${{ matrix.platform == 'ubuntu-latest' }}
         run: sudo apt-get install libgl1-mesa-dev
-      - name: Install Qt binding
-        if: ${{ matrix.qt-binding == 'PySide2' }}
-        run: pip install PySide2==5.15.2
+#      - name: Install Qt binding
+#        if: ${{ matrix.qt-binding == 'PySide2' }}
+#        run: pip install PySide2==5.15.2
       - name: Install Qt binding
         run: pip install ${{ matrix.qt-binding }}
       - name: Run Qt binding tests