message: fix webpack filesystem used when creating a stylable instance
  should fix bugs related to file watching
diff: @@ -73,7 +73,7 @@ export class StylableWebpackPlugin {
  public createStylable(compiler: webpack.Compiler) {
  const stylable = new Stylable(
  compiler.context,
  - compiler.inputFileSystem as any,
  + (compiler.inputFileSystem as any).fileSystem || compiler.inputFileSystem as any,
  this.options.requireModule,
  '__',
  meta => {
  