Update latest dependencies

- update latest dependencies including next.js 12.x
- update readme
- set "incremental": true in tsconfig.json for Faster subsequent builds
https://www.typescriptlang.org/docs/handbook/release-notes/typescript-3-4.html#faster-subsequent-builds-with-the---incremental-flag

Author: vuongddang

README.md

@@ -1,5 +1,5 @@
 # Next.js TailwindCSS Typescript Starter
-This is a [Next.js](https://nextjs.org/) 11.x, [TailwindCSS](https://tailwindcss.com/) 2.x, and [TypeScript](https://www.typescriptlang.org/docs/home.html) 4.x starter template
+This is a [Next.js](https://nextjs.org/) 12.x, [TailwindCSS](https://tailwindcss.com/) 2.x, and [TypeScript](https://www.typescriptlang.org/docs/home.html) 4.x starter template
 
 For more details, see my blog post. [Nextjs TailwindCSS Typescript Starter](https://dev.to/vuongddang/nextjs-tailwindcss-typescript-starter-1c2m)