Add -main suffix to package dependency mocks
Add -main suffix to package dependency mocks

This will make it easier to know when the main file is used. Pointed out
by @lencioni in
https://github.com/trotzig/import-js/commit/085aa7a28c7a1abd8a179e17258b63922e517aec#commitcomment-16670359

trotzig/import-js,Galooshi/import-js,trotzig/import-js,trotzig/import-js