Remove caps on yapf and isort

Author: domdfcoding

requirements.txt

@@ -6,7 +6,7 @@ click>=7.1.2
 consolekit>=1.0.0
 dom-toml>=0.4.0
 domdf-python-tools>=2.5.0
-isort<5.11.0,>=5.5.2
+isort>=5.5.2
 prettyprinter>=0.18.0
 typing-extensions>=3.7.4.3
-yapf<0.33.0,>=0.30.0
+yapf>=0.30.0