Bug 974165 - bump marionette-client version to 0.7.4 and release to pypi

testing/marionette/client/setup.py

@@ -1,7 +1,7 @@
 import os
 from setuptools import setup, find_packages
 
-version = '0.7.3'
+version = '0.7.4'
 
 # get documentation from the README
 try: