Update ruamel.yaml to latest (#260)

Author: sirosen

setup.cfg

@@ -19,7 +19,7 @@ python_requires = >=3.7
 # reference for dependency spec: https://www.python.org/dev/peps/pep-0508/
 install_requires =
     importlib-resources>=1.4.0;python_version<"3.9"
-    ruamel.yaml==0.17.21
+    ruamel.yaml==0.17.22
     jsonschema>=4.5.1,<5.0
     requests<3.0
     click>=8,<9