Move scrapeHTML into its own package

[malte-v]

I'd like to use your package from a React Native app, where the Node.js core modules are not available. scrape-it indirectly depends on tinyreq, which in turn uses Node's url module. I'm only using scrapeHTML, so all the networking stuff is not required. Could you move scrapeHTML into its own package, say "scrape-it-core", so people can use the offline functionalily independently? Thanks!

[IonicaBizau]

I was thinking of this too. Perhaps will wokr on this next days. Thanks for the idea! ✨