Update README.md

Author: source-nerd

README.md

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 # Twitter Scraper
 [![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)
+[![Updates](https://pyup.io/repos/github/source-nerd/twitter-scraper/shield.svg)](https://pyup.io/repos/github/source-nerd/twitter-scraper/)
 
 A simple Python based Twitter Scraper with the ability of scripng tweets either by username or by a search query (Supports other search params as well). This program supports `STOP / RESUME` operation as it keeps a log of all the previous position id's. 
 This project was created inorder to bypass twitter's 7 day policy since it doesn't allow to fetch tweets which are more than 7 days old as I needed some data for my research project.