Support multiple tslint config files

[yebrahim]

Is this a bug report?

No

It would be great if multiple tslint files are supported. Use case: Currently I have a directory with auto-generated TS declaration files that I import, and I don't control how those files are generated, so I end up having a custom tslint.json file in that directory to disable the rules I don't want.

[elektronik2k5]

Unfortunately, that's aligned with upstream CRA :(
#388 (comment)

I work around that by combining CRA-TS with react-app-rewired.