Merge pull request #390 from online-judge-tools/release/5.6.0

RELEASE: 5.6.0

Author: kmyk

setup.py

@@ -3,7 +3,7 @@
 
 setup(
     name='online-judge-verify-helper',
-    version='5.5.3',
+    version='5.6.0',
     author='Kimiyuki Onaka',
     author_email='[email protected]',
     url='https://github.com/kmyk/online-judge-verify-helper',