Publish the changes so as to support Node v12.x

[harshit3994]

[harshit3994]

It seems your changes have not been published via npm although i could i see the latest commit to support v12.x 4 months ago!

[fangzhuchen]

We really need v12.x support ASAP!

[LeBovin]

Up, we really need it

[richRemer]

If you're just looking to verify password hashes from shadow files on a recent version of Node.js, I've published https://www.npmjs.com/package/shadow-verify to handle this specific case.