added version option to command description

[philipodev]

Hi, awesome project you got there.

Noticed, when looking for it, there's no description in --help how to output the current version so i added it.

[yeskunall]

Don't think this is needed. commander handles this for you.

EDIT: Looks like parcel is overriding the automated help. My bad. However, you can avoid repeating yourself by just adding that under the help section.

[philipodev]

@yeskunall hmm, you're right. no point in having the description in anything other than --help. i have commited changes for this. thanks

[devongovett]

parcel --version already works.

[philipodev]

@devongovett yes it does, but this PR simply adds it to the --help. I was personally looking for it when -v (lowercase) didn't work.

[yeskunall]

@philipodev with your current changes, won't this only work for the serve command? I'm just curious 😅

[philipodev]

@yeskunall yes, but parcel is using that command as --help. But if you type parcel watch --help you get the help for watch command and then I don't think printing the version option is relevant. :)