Bundled license information:

is-plain-object/dist/is-plain-object.mjs:
  /*!
   * is-plain-object <https://github.com/jonschlinkert/is-plain-object>
   *
   * Copyright (c) 2014-2017, Jon Schlinkert.
   * Released under the MIT License.
   */

cssesc/cssesc.js:
  /*! https://mths.be/cssesc v3.0.0 by @mathias */
