TypeScript preset should always be enabled (#7137)
TypeScript preset should always be enabled (#7137)

The preset handles file toggling itself, and actually changes behavior between `.ts` and `.tsx`.
flybayer/next.js,JeromeFitz/next.js,azukaru/next.js,JeromeFitz/next.js,BlancheXu/test,azukaru/next.js,BlancheXu/test,JeromeFitz/next.js,zeit/next.js,zeit/next.js,zeit/next.js,azukaru/next.js,BlancheXu/test,JeromeFitz/next.js,azukaru/next.js,flybayer/next.js,flybayer/next.js,flybayer/next.js