Update dependency react-scripts-ts to v3

[xcomponentadmin]

This PR contains the following updates:

Package	Type	Update	Change	References
react-scripts-ts	devDependencies	major	^2.8.0 -> ^3.0.0	source

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[xcomponentadmin]

⚠️ Lock file problem

Renovate failed to update a lock file. You probably do not want to merge this PR as-is.

♻️ Renovate will retry this branch, including lockfile, only when one of the following happens:

• any of the package files in this branch needs updating, or
• the branch becomes conflicted, or
• you rename this PR's title to start with "rebase!" to trigger it manually

The lock file failure details are included below:

yarn.lock

warning react-scripts-ts > extract-text-webpack-plugin@3.0.2: Deprecated. Please use https://github.com/webpack-contrib/mini-css-extract-plugin
warning react-scripts-ts > autoprefixer > browserslist@2.11.3: Browserslist 2 could fail on reading Browserslist >3.0 config used in other tools.
warning react-scripts-ts > babel-preset-react-app > babel-preset-env > browserslist@2.11.3: Browserslist 2 could fail on reading Browserslist >3.0 config used in other tools.
warning react-scripts-ts > ts-jest > jest-config > jest-environment-jsdom > jsdom > left-pad@1.3.0: use String.prototype.padStart()
error An unexpected error occurred: "https://registry.yarnpkg.com/rxjs-compat/-/rxjs-compat-6.3.3.tgz: ESOCKETTIMEDOUT".
Process stalled
Active handles:
  - Socket
  - Socket
  - Socket
  - TLSSocket
  - TLSSocket
  - TLSSocket
  - TLSSocket

[xcomponentadmin]

Autoclosing Skipped

This PR has been flagged for autoclosing, however it is being skipped due to the branch being already modified. Please close/delete it manually or report a bug if you think this is in error.