REL: update version for next development round

setup.py

@@ -47,9 +47,9 @@ from setuptools import find_packages, setup
 
 MAJOR = 0
 MINOR = 5
-MICRO = 0
+MICRO = 1
 PRE = ""  # e.g. rc0, alpha.1, 0.beta-23
-ISRELEASED = True
+ISRELEASED = False
 
 if PRE:
     VERSION = "{}.{}.{}-{}".format(MAJOR, MINOR, MICRO, PRE)