Fix dependencies for @typescript-eslint/eslint-plugin

[mikeharder]

• @typescript-eslint/eslint-plugin@1.12.0 introduced an implicit dependency on @typescript-eslint/typescript-estree
  • This should be fixed in a future release of @typescript-eslint/eslint-plugin
  • eslint-plugin should not import from typescript-estree typescript-eslint/typescript-eslint#705

This change allows rush lint to work with @typescript-eslint/eslint-plugin@1.12.0. Without this change, rush lint fails with the following error:

Error: Cannot find module '@typescript-eslint/typescript-estree'
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:636:15)
    at Function.Module._load (internal/modules/cjs/loader.js:562:25)
    at Module.require (internal/modules/cjs/loader.js:690:17)
    at require (internal/modules/cjs/helpers.js:25:18)
    at Object.<anonymous> (D:\Git\typescript-eslint-test\node_modules\.registry.npmjs.org\@typescript-eslint\eslint-plugin\1.12.0_db854cf46887ef4aa7b9323cccc417a5\node_modules\@typescript-eslint\eslint-plugin\dist\rules\prefer-readonly.js:17:29)
    at Module._compile (internal/modules/cjs/loader.js:776:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:787:10)
    at Module.load (internal/modules/cjs/loader.js:653:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:593:12)
    at Function.Module._load (internal/modules/cjs/loader.js:585:3)