The HEIC reader of the HEIC to JPG tool (/image/heic-to-jpg/). Used only by that page, and only when the browser cannot open HEIC by itself
(Safari can).

  libheif-bundle.js   libheif-js 1.23.5   https://github.com/catdad-experiments/libheif-js
                      npm tarball sha1 (libheif-js-1.23.5.tgz): 6d44e05c7004b98d08ab9bec664d8121056112eb
                      this file is libheif-wasm/libheif-bundle.js of that package, as published, sha256:
                      074b2b55ef3de477ba9f794ca381f3f0324c1cba8c91b4af07395f39c22d54cc
  Inside it:          libheif   https://github.com/strukturag/libheif   (GNU LGPL 3.0)  and its HEVC decoder
                      libde265  https://github.com/strukturag/libde265  (GNU LGPL 3.0)  compiled to WebAssembly with Emscripten.
                      It can only read pictures (no encoder), and no GPL code is in it.
  LICENSE-libheif.txt the licence texts of the package: the GNU Lesser General Public License version 3 and, for libheif's own
                      sample code, MIT. They must stay with the file.

The Lesser GPL asks that the library stay a file of its own that can be replaced, unchanged, with its licence and a way to get its
source. So: this file is exactly as published (nothing in it was edited), it is loaded by one <script> tag of its own on that page only,
nothing else of the site is built into it, and the source is at the addresses above (the files of the version named here). To use
another build of the library, put it in place of this file (and update VENDORED in test/tools-offline.test.mjs). The tool's own code
(heic.js) only calls its public interface: libheif() gives an object with HeifDecoder; decode() gives the pictures; display() draws one.