noUnsafeReturn, based on typescript-eslint/no-unsafe-return

[jpike88]

I ran into a nasty bit of code smell today, where an any was bubbled up through some functions to be returned by a function with a different signature.

This rule would have prevented that, and ensured that the 'any' variable was handled or coerced into a type before being returned anywhere.

https://github.com/typescript-eslint/typescript-eslint/blob/main/packages/eslint-plugin/docs/rules/no-unsafe-return.md

[jpike88]

example code that would have been allowed if this rule wasn't on...

function wtf():Promise<number>{
  const a: any = 'wtf';
  return a;
}

[Conaclos]

Thanks to bring it to light! I added this rule in the list of rules we want to support.