no-check doesn't support some features

[kitsonk]

The current implementation of --no-check does not support some features which are supportable without the flag. The related TypeScript compiler options are:

• emitDecoratorMetadata - If experimentalDecorators is true and this is true then meta data is emitted.
• experimentalDecorators - Isn't set to true by default, but can be set using a tsconfig.json.
• jsx - By default we use "react" setting. Current behaviour is effectively the default of "preserve".
• jsxFactory - This feature is supported using a tsconfig.json.
• jsxFragmentFactory - This feature is supported using a tsconfig.json.

Currently we support reactNamespace but it should be ignored. It is deprecated and redundant with the jsxFactory and jsxFragmentFactory options.

cc/ @bartlomieju

[bartlomieju]

@kitsonk I'm gonna backport your solution from https://github.com/denoland/deno/pull/6894 into #7161