Removes [socket.io-parser](https://github.com/socketio/socket.io-parser). It's no longer used after updating ancestor dependencies [socket.io-parser](https://github.com/socketio/socket.io-parser), [@microsoft/sp-build-web](http://aka.ms/spfx) and [@microsoft/sp-webpart-workbench](http://aka.ms/spfx). These dependencies need to be updated together.
Removes `socket.io-parser`
Updates `@microsoft/sp-build-web` from 1.7.1 to 1.15.2
Updates `@microsoft/sp-webpart-workbench` from 1.7.1 to 1.12.1
---
updated-dependencies:
- dependency-name: socket.io-parser
dependency-type: indirect
- dependency-name: "@microsoft/sp-build-web"
dependency-type: direct:development
- dependency-name: "@microsoft/sp-webpart-workbench"
dependency-type: direct:development
...
Signed-off-by: dependabot[bot] <support@github.com>
* This sample shows how appSettings.json file can be added and unsed within SharePoint Framewrok webparts similar to the Web.config / App.config key value app settings in .NET Framework projects.
* Update README.md
Typos fix