TSDX
Zero-config CLI for TypeScript package development
...TSDX will create a folder with the project template in it and install all dependencies. Once that's done, you're ready to rock. TypeScript, Rollup, Jest, ESlint, and all other plumbing are already set up with best practices. Just start editing src/index.ts (or src/index.tsx if you chose one of the React templates) and go.