Update pytest-lockable requirement (#17)

Author: lorjala

setup.py

@@ -23,7 +23,7 @@
         "pytest>=5.0",
         "pytest-metadata",
         "stf-appium-client==0.10.0",
-        "pytest-lockable==0.9.1"],
+        "pytest-lockable>=0.9.0,<0.10.0"],
     # List additional groups of dependencies here (e.g. development
     # dependencies). Users will be able to install these using the "extras"
     # syntax, for example: