`Tests` Doc Page

## `Tests` Doc Page

A Documentation Page to teach how to create tests for a request. 

More info at: https://speakerdeck.com/cmaiacd/europython-2020-scanapi-automated-integration-testing-and-live-documentation-for-your-api?slide=22



The page should be under https://github.com/scanapi/website/tree/master/_docs_v1