fix(scripts): fix recognize lack of argument for scripts

[PatrykKuniczak]

Overview

I fixed check for no argument for scripts

if (pkg == null) 

which don't work(because if user don't type nothing undefined is return
with

if(!pkg)

which works :)

And i cleaned code a little, of unnecessary console.log()

Manual Testing

Try to use all of those scripts without argument.

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[PatrykKuniczak]

Sorry for a little mess, i haven't checked rest of the code for fs-extra references, we need to fix it in another way, change fs-extra to fs/promises isn't solutions :(