Update reCaptcha handling

[ghost]

Fixes #259

[codemanki]

Thank you!

[codemanki]

I guess this should be a minor version bump?

[ghost]

Please allow me to review it again as something just caught my eye.
Minor version bump.

One sec...

[codemanki]

No problem, take your time

[ghost]

For quick testing:

const cloudscraper = require('.');
cloudscraper.debug = true;
cloudscraper.get({ uri: 'https://captcha.website', onCaptcha: () => {} })

// Logs response.captcha, siteKey matches, and whether a fallback was used.

It won't log all of the siteKey matches unless debugging and the primary isn't found.
In practice, all of the keys are the same but it's defensive anyway and prefers the best possible match.