Bug in qtloader.js: Setting environment variables fails

There is a bug in qtloader.js which doesn't allow setting environment variables as it is documented. 

The origin code will produce the following javascript error:

Unable to set <key> of undefined.

line 397 in qtloader.js needs to be

ENV[key.toUpperCase()] = value;

instead of 

Module.ENV[key.toUpperCase()] = value;

See https://emscripten.org/docs/porting/connecting_cpp_and_javascript/Interacting-with-code.html#interacting-with-code-environment-variables .

ENV is not part of the Module object.