bump version to 0.5.0

Author: moesoha

setup.py

@@ -3,7 +3,7 @@
 
 setup(
     name='cyaron',
-    version='0.5.dev1',
+    version='0.5.0',
     keywords='olympic informatics luogu aqours cyaron lovelive sunshine online judge',
     description='CYaRon: Yet Another Random Olympic-iNformatics test data generator, A library for automatically generating test data for Online Judge, Olympic Informatics or automatic application testing',
     license='LGPLv3',