Replace `mkdirp` with `fs.mkdirSync(path, { recursive: true })`

[trivikr]

Is your feature request related to a problem? Please describe.

The mkdirp.sync utility is used in

json-schema-to-typescript/src/cli.ts

Line 122 in 17dc5ed

mkdirp.sync(dirname(outputPath))

Node.js fs.mkdirSync added recursive option in Node.js v10.12.0 published on Oct 10, 2018.

The mkdirp currently uses these native APIs:

• https://github.com/isaacs/node-mkdirp/blob/fdf6005432c2506ce31f8cae237039dda2f8479d/src/opts-arg.ts#L4-L8
• https://github.com/isaacs/node-mkdirp/blob/fdf6005432c2506ce31f8cae237039dda2f8479d/src/mkdirp-native.ts#L13-L19

Describe the solution you'd like

Replace mkdirp with fs.mkdirSync(path, { recursive: true })