No need to create tsconfig.json

[dotherightthing]

Create your tsconfig.json

Then run

tsc --init --declaration --allowSyntheticDefaultImports --target esnext --outDir lib

This command also generates tsconfig.json. If the file already exists there is an error message:

error TS5054: A 'tsconfig.json' file is already defined at: '/Volumes/DanBackup/Websites/wpdtrt-plugin-boilerplate/tsconfig.json'.

[peterblazejewicz]

That's how tsc cli works under the hood I think, has no relation to bootstraping this project:
https://github.com/microsoft/TypeScript/blob/39311da27bf4848594b56c8a43c559f149b0f63c/src/executeCommandLine/executeCommandLine.ts#L723-L740