Update Facebook SDK 4.33.0 for iOS 11

[peterpeterparker]

Looks like Facebook released, again, a new Facebook iOS SDK in order to be compatible with iOS11

This time new SDK is v4.33.0

I will take care of updating it and will test the login
@peterpeterparker

Doc: https://developers.facebook.com/docs/ios/componentsdks/

Release notes: https://developers.facebook.com/docs/ios/change-log-4x

Download link: https://origincache.facebook.com/developers/resources/?id=facebook-ios-sdk-current.zip

[peterpeterparker]

I have integrated the Facebook iOS SDK 4.33.0 in the master branch. If I understand correctly (I just had a look to the .h files) they mostly added new information regarding their new policy that users could only be logged/use an app 90 days (they added some token expired info) and also migrated to their Graph v3

I did test successfully a couple of login on my iPhone 6s / iOS 11.3

Therefore I did release in npm this with version v2.1.0 of cordova-plugin-facebook4