Correctly separate out webpack-helpers.d.ts

[PeterFaiman]

The webpack install code from https://stimulusjs.org/handbook/installing is for javascript. It should work for typescript too if the extension is changed from js to ts, but it generates the following error:

ERROR in /Users/peterfaiman/code/stimulus-example/src/index.ts
[tsl] ERROR in /Users/peterfaiman/code/stimulus-example/src/index.ts(2,40)
      TS7016: Could not find a declaration file for module 'stimulus/webpack-helpers'. '/Users/peterfaiman/code/stimulus-example/node_modules/stimulus/webpack-helpers.js' implicitly has an 'any' type.

Typescript finds the declaration once moved to webpack-helpers.d.ts.

[javan]

Thanks! You can work around this for now by installing and importing the @stimulus/webpack-helpers package directly:

import { definitionsFromContext } from "@stimulus/webpack-helpers"