bump vcert version

Author: angelmoo

setup.py

@@ -11,7 +11,7 @@
     long_description = f.read()
 
 setup(name='vcert',
-      version='0.18.0',
+      version='0.18.1',
       url="https://github.com/Venafi/vcert-python",
       packages=['vcert', 'vcert.parser', 'vcert.policy'],
       install_requires=['requests==2.32.4', 'python-dateutil==2.8.2', 'six==1.17.0',