[Regression] Specifying knownHelpers in 1.1.0

[stavarotti]

In version 1.0.2, we were able to specify an array of knownHelpers along with the helperDirs like so:

{
  test: /\.hbs$/,
  loader: 'handlebars-loader',
  query: {
    helperDirs: [path.join(__dirname, 'src/templates/helpers')],
    knownHelpers: ['inline-if']
  }
},

In version 1.1.0, the configuration above fails. You instead have to specify the extension for each helper specified in knownHelpers like so:

{
  test: /\.hbs$/,
  loader: 'handlebars-loader',
  query: {
    helperDirs: [path.join(__dirname, 'src/templates/helpers')],
    knownHelpers: ['inline-if.js']
  }
},

I looked at the readme docs in addition to the release notes to see if something had changed or was mentioned however, I was not able to find anything.

Is this change intended? Is the config option meant to work with or without an extension?