Enforce extensions on TypeScript files as well

[fregante]

I think this config should be dropped. Reasons:

• it actually "breaks" the rule for .ts/tsx files because it allows them to be imported without extension

  1. create file.ts
  2. import './file' in another.ts
  3. No errors! 😰

• it duplicates TypeScript’s own error, but with a worse message:

  

[fregante]

The side effect of this change is that the rule will now suggest to use .ts extension in that case

  2:27  error  Missing file extension "ts" for "./sender"  import/extensions

but once you add it, TypeScript will ask you to change it to .js, which is fine and is really TypeScript’s limit and rule here.

error TS2691: An import path cannot end with a '.ts' extension. Consider importing './sender.js' instead.