[SDK] [iOS] Release v1.2.1.1

GitHub release
Integration guide

Changelog:

• Proper WebView sizing for HTML in-apps
• Flush pending putInstallationCustomProperties call on app going background
• Perform network calls in background tasks to avoid being suspended
• Fixed localization of foreground system-like alert
• Generalized type checks from any NSDictionary or NSArray values
• Warn if using the SDK before initializing it
• Identify new devices
• Detect fingerprint scanner
• Switched the dev SDK project to Cocoapods 1.0.1 (no changes for the integrator)