build failing for v20251116 onwards

[sndsgd]

It looks like eb8adb1 introduced some js that causes the //:compiler_uberjar_deploy.jar target to fail:

src/com/google/javascript/jscomp/js/util/eventlistener.js:121:25: ERROR - [JSC_POSSIBLE_INEXISTENT_PROPERTY] Property handleEvent never defined on listener

This property is accessed on a "loose" type, but is not defined anywhere in the program, so it must not exist.
  121|         var h = listener.handleEvent;
                                ^^^^^^^^^^^

1 error(s), 0 warning(s), 92.6% typed
Target //:compiler_uberjar_deploy.jar failed to build

This change has caused the build to fail for the NPM package mentioned in the README, as well as my docker image builder.

[concavelenz]

We should just change this to use the var h = listener['handleEvent'];

[lauraharker]

This should be fixed in v20251118 by 292403b