fix(ruamel): upgrades ruamel version on setup.py to 0.18.5

Author: rvelaVenafi

setup.py

@@ -15,7 +15,7 @@
       url="https://github.com/Venafi/vcert-python",
       packages=['vcert', 'vcert.parser', 'vcert.policy'],
       install_requires=['requests==2.31.0', 'python-dateutil==2.8.2', 'certvalidator<=0.11.1', 'six==1.16.0',
-                        'cryptography==40.0.2', 'ruamel.yaml==0.17.31', 'pynacl==1.5.0'],
+                        'cryptography==40.0.2', 'ruamel.yaml==0.18.5', 'pynacl==1.5.0'],
       description='Python client library for Venafi Trust Protection Platform and Venafi Cloud.',
       long_description=long_description,
       long_description_content_type="text/markdown",