Bump 2.6 release

Author: Peter Amstutz

setup.py

@@ -11,7 +11,7 @@
     long_description = readmeFile.read()
 
 setup(name='wes-service',
-      version='2.5',
+      version='2.6',
       description='GA4GH Workflow Execution Service reference implementation',
       long_description=long_description,
       author='GA4GH Containers and Workflows task team',