Update setup.py

bump version for Arina Dectris release

Author: ercius

setup.py

@@ -23,7 +23,7 @@
     # Versions should comply with PEP440.  For a discussion on single-sourcing
     # the version across setup.py and the project code, see
     # https://packaging.python.org/en/latest/single_source_version.html
-    version='1.12',
+    version='1.13.1',
 
     description='openNCEM\'s Python Package',
     long_description=long_description,