Leanplum Segment iOS 1.1.4

• Updated iOS SDK to ~> 3 (latest now 3.1.0)
• Updated Segment SDK to ~> 4 (latest now 4.1.2)
• Minimum iOS Version is now 10.0 (required by Segment; Leanplum min is 9.0)
• Updated Example project
• Swift name for factory - SegmentLeanplumIntegrationFactory