Float casting on minScore field

[godiez]

If the user language is set with a certain value (I tryed German, French, Spanish...) different from System Default Locale, when you try to create a reCaptcha type on forms and save it, it triggers symfony validator and raises a 500 error:

mautic.CRITICAL: Uncaught PHP Exception Symfony\Component\Form\Exception\TransformationFailedException: "Unable to transform value for property path "[minScore]": Expected a numeric."

[adiux]

@KonstantinCodes looks like a good fix. Thanks @godiez

[adiux]

@KonstantinCodes can this be merged?