qrcodegen.js: QR Code generator library by Project Nayuki, version 1.8.0
https://www.nayuki.io/page/qr-code-generator-library
https://github.com/nayuki/QR-Code-generator

Taken from the npm package nayuki-qr-code-generator 1.8.0 (the library's TypeScript compiled to JavaScript,
packaged by Kirill Maltsev), file index.js, with its last line `export default qrcodegen;` removed so that it
runs as a plain script and defines the global `qrcodegen`. Nothing else is changed.
  npm tarball sha1:      dbeebd7b3d2b53119c51a596ad43199ef6798916
  index.js sha256:       daa3aa30adbaf99c4e415f33b9042767e74f053896e55ad06f898d344917d2a7
  qrcodegen.js sha256:   3aa8abbf00917b15de7577e5474bef316c1d5b0e46f5ccf2bb679fd65a738338


The library (MIT License, as in the header of qrcodegen.js):

  QR Code generator library (TypeScript)

  Copyright (c) Project Nayuki. (MIT License)
  https://www.nayuki.io/page/qr-code-generator-library

  Permission is hereby granted, free of charge, to any person obtaining a copy of
  this software and associated documentation files (the "Software"), to deal in
  the Software without restriction, including without limitation the rights to
  use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
  the Software, and to permit persons to whom the Software is furnished to do so,
  subject to the following conditions:
  - The above copyright notice and this permission notice shall be included in
    all copies or substantial portions of the Software.
  - The Software is provided "as is", without warranty of any kind, express or
    implied, including but not limited to the warranties of merchantability,
    fitness for a particular purpose and noninfringement. In no event shall the
    authors or copyright holders be liable for any claim, damages or other
    liability, whether in an action of contract, tort or otherwise, arising from,
    out of or in connection with the Software or the use or other dealings in the
    Software.


The npm packaging (LICENSE of nayuki-qr-code-generator):

  MIT License

  Copyright (c) 2022 Kirill Maltsev

  Permission is hereby granted, free of charge, to any person obtaining a copy
  of this software and associated documentation files (the "Software"), to deal
  in the Software without restriction, including without limitation the rights
  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  copies of the Software, and to permit persons to whom the Software is
  furnished to do so, subject to the following conditions:

  The above copyright notice and this permission notice shall be included in all
  copies or substantial portions of the Software.

  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  SOFTWARE.