Update version to pre-release

darfix/version.py

@@ -67,10 +67,10 @@ RELEASE_LEVEL_VALUE = {"dev": 0,
                        "final": 15}
 
 MAJOR = 0
-MINOR = 5
+MINOR = 6
 MICRO = 0
-RELEV = "final"  # <16
-SERIAL = 5  # <16
+RELEV = "rc"  # <16
+SERIAL = 1  # <16
 
 date = __date__