Bump version to 2.3.0

Author: thombashi

setup.py

@@ -21,7 +21,7 @@
 
 setup(
     name="allpairspy",
-    version="2.2.0",
+    version="2.3.0",
     description="Pairwise test combinations generator",
     long_description="""Pairwise (aka 'all-pairs') test combinations generator written in
 Python. Allows one to create a set of tests using 'pairwise combinations' method,