This commit verifies that the child_process fork() method does
not honor the shell option.
Refs: https://github.com/nodejs/node/pull/15299
PR-URL: https://github.com/nodejs/node/pull/15352
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>