message: Create null object to have a cleaner map of remappings
diff: @@ -173,7 +173,8 @@ export class Remapper implements IRemapper {
  }
  private _getRemappings(): { [key: string]: IKeyRemapping } {
  - let remappings: { [key: string]: IKeyRemapping } = {};
  + // Create a null object so that there is no __proto__
  + let remappings: { [key: string]: IKeyRemapping } = Object.create(null);
  for (let remapping of configuration[this._configKey] as IKeyRemapping[]) {
  let debugMsg = `before=${remapping.before}. `;
  