Update the README to drop Python 3.5 support (#13505)

Author: brettcannon

README.md

@@ -1,6 +1,6 @@
 # Python extension for Visual Studio Code
 
-A [Visual Studio Code](https://code.visualstudio.com/) [extension](https://marketplace.visualstudio.com/VSCode) with rich support for the [Python language](https://www.python.org/) (for all [actively supported versions](https://devguide.python.org/#status-of-python-branches) of the language: 2.7, >=3.5), including features such as IntelliSense, linting, debugging, code navigation, code formatting, Jupyter notebook support, refactoring, variable explorer, test explorer, snippets, and more!
+A [Visual Studio Code](https://code.visualstudio.com/) [extension](https://marketplace.visualstudio.com/VSCode) with rich support for the [Python language](https://www.python.org/) (for all [actively supported versions](https://devguide.python.org/#status-of-python-branches) of the language: 2.7, >=3.6), including features such as IntelliSense, linting, debugging, code navigation, code formatting, Jupyter notebook support, refactoring, variable explorer, test explorer, snippets, and more!
 
 ## Quick start
 

news/3 Code Health/13459.md

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+Drop support for Python 3.5 (it reaches end-of-life on September 13, 2020 and isort 5 does not support it).