update pytest-flake8 version requirement

Author: LegionKing

setup.py

@@ -4,7 +4,7 @@
     'pytest>=4',
     'pytest-cov>=2.6.0',
     # 'pytest-flake8==4.0.1',
-    'pytest-flake8<5.0.0',
+    'pytest-flake8<1.1.2',
     'flake8<5.0.0'
 ]