reason string - The reason the render process is gone. Possible values:
clean-exit - Process exited with an exit code of zero
abnormal-exit - Process exited with a non-zero exit code
killed - Process was sent a SIGTERM or otherwise killed externally
crashed - Process crashed
oom - Process ran out of memory
launch-failed - Process never successfully launched
integrity-failure - Windows code integrity checks failed
exitCode Integer - The exit code of the process, unless reason is
launch-failed, in which case exitCode will be a platform-specific
launch failure error code.