Preparing for release of version 6.4.2

Author: LaunchDarklyCI

ldclient/version.py

@@ -1 +1 @@
-VERSION = "6.4.1"
+VERSION = "6.4.2"

setup.py

@@ -13,7 +13,7 @@ def parse_requirements(filename):
     return [line for line in lineiter if line and not line.startswith("#")]
 
 
-ldclient_version='6.4.1'
+ldclient_version='6.4.2'
 
 # parse_requirements() returns generator of pip.req.InstallRequirement objects
 install_reqs = parse_requirements('requirements.txt')