Update README.md

Author: AbhijitSwami

README.md

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 rwbasechat is a simple chat webpart to include as webparts on SharePoint Online sites. It allows you to communicate through chat messages with your SharePoint audience.
 To achieve this, this webpart uses a SharePoint list where the messages are stored. There is emoji support, but still a lot to do, especially on security and stability issues.
 
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 ### Building the code
 
 ```bash