Bump up version to 1.2.4

Author: AdityaHirapara

setup.py

@@ -5,7 +5,7 @@
 setup(
   name = 'browserstack-local',
   packages = ['browserstack'],
-  version = '1.2.3',
+  version = '1.2.4',
   description = 'Python bindings for Browserstack Local',
   author = 'BrowserStack',
   author_email = '[email protected]',