Update README.md (#105)

Author: Kircheneer

README.md

@@ -46,8 +46,8 @@ Pull requests are welcomed and automatically built and tested against multiple v
 
 The project is following Network to Code software development guidelines and are leveraging the following:
 
-- Black, Pylint, Bandit, flake8, and pydocstyle for Python linting and formatting.
+- Black, Pylint, Bandit, flake8, and pydocstyle, mypy for Python linting, formatting and type hint checking.
 - pytest, coverage, and unittest for unit tests.
 
 # Questions
-Please see the [documentation](https://diffsync.readthedocs.io/en/latest/index.html) for detailed documentation on how to use `diffsync`. For any additional questions or comments, feel free to swing by the [Network to Code slack channel](https://networktocode.slack.com/) (channel #networktocode). Sign up [here](http://slack.networktocode.com/)
+Please see the [documentation](https://diffsync.readthedocs.io/en/latest/index.html) for detailed documentation on how to use `diffsync`. For any additional questions or comments, feel free to swing by the [Network to Code slack channel](https://networktocode.slack.com/) (channel #networktocode). Sign up [here](http://slack.networktocode.com/)