How should the TypeScript package be installed?

[j-f1]

Repro

{
  "parserOptions": {
    "parser": "eslint-plugin-typescript/parser"
  }
}

// literally any code
it can be valid or invalid, doesn't matter

Expected Result
Linting passes

Actual Result

Parsing error: Cannot find module 'typescript'

Additional Info

I’ve only installed eslint-plugin-typescript.

Versions

package	version
eslint-plugin-typescript	bradzacher/eslint-plugin-typescript#4d85404
typescript-eslint-parser	21.0.2 (automatically installed)
typescript	(not installed)

Should typescript be a peer dependency?

[weirdpattern]

I thought typescript was a hard dependency of typescript-eslint-parser, turns out is marked as a peer dependency... So yes, think we need it too

[armano2]

peerDependency is fine, but hard dependency is bad, i'm using it with typescript 3.2.2 due to inifite loop issue in typescript~3.1 (build time with type checking is going down from 90sec to 6sec)

[bradzacher]

probably peer dependency is the best way to go.
plus update docs to indicate the required install of typescript.