Bump version to 1.3.1

Author: samarthmistry

src/docplex_extensions/__init__.py

@@ -9,7 +9,7 @@
 modeling with DOcplex — IBM® Decision Optimization CPLEX® Modeling for Python.
 """
 
-__version__ = '1.3.0'
+__version__ = '1.3.1'
 
 # Check required dependencies
 from importlib.util import find_spec as _find_spec