chore(deps): bump tar and @microsoft/sp-build-web

Removes [tar](https://github.com/isaacs/node-tar). It's no longer used after updating ancestor dependency [@microsoft/sp-build-web](http://aka.ms/spfx). These dependencies need to be updated together.


Removes `tar`

Updates `@microsoft/sp-build-web` from 1.20.2 to 1.22.2

---
updated-dependencies:
- dependency-name: tar
  dependency-version: 
  dependency-type: indirect
- dependency-name: "@microsoft/sp-build-web"
  dependency-version: 1.22.2
  dependency-type: direct:development
...

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Author: dependabot[bot]