Bump version

Author: Bryan Bartley

setup.py

@@ -6,7 +6,7 @@
 
 setup(name='sbol_factory',
       description='Ontology-driven data modeling',
-      version='1.0a13',
+      version='1.0a12',
       install_requires=[
             'sbol3>=1.0b12',  # Note: implicitly includes rdflib
             'sparqlwrapper>=1.8.5',