README: update minimun Python version required

Author: Tattoo

README.md

@@ -24,7 +24,7 @@ $ pip install robotframework-oxygen
 ## Pre-requisites
 
 - Oxygen is supported on Windows, Linux and MacOS
-- [Python 3.7](http://python.org) or above
+- [Python 3.10](http://python.org) or above
 - [pip](https://pypi.python.org/pypi/pip) for easy installation
 - [Robot Framework](http://robotframework.org)
 - [additional dependencies](requirements.txt)