Feature Request: Remove the limit of sharing only 1 to 6 photos

[Rennix09]

Checklist before submitting a feature request

• I've updated to the latest released version of the SDK
• I've searched for existing Github issues
• I've read the Code of Conduct

Goals

I got an error when sharing too many photos via iOS (say 10):

FacebookShareSDK: error - 
com.facebook.sdk:FBSDKErrorDeveloperMessageKey"	
photos must have 1 to 6 values

In fact, facebook already supports sharing more than 6 photos, I'm not sure if it's the iOS SDK that follows the old photos limit here.

Expected results

Got no errors when I share 10 or more photos to facebook via iOS

Code samples & details

SDK verison I use is 17.4

[shi7]

17.4 has same issue.