added objective c support

Author: kdhingra07

Example/BasicExample/BasicExample.xcworkspace/xcshareddata/swiftpm/Package.resolved

@@ -22,7 +22,7 @@ let package = Package(
         .package(
             name: "Segment",
             url: "https://github.com/segmentio/analytics-swift.git",
-            from: "1.1.2"
+            from: "1.4.1"
         )
     ],
     targets: [

Package.resolved

@@ -30,6 +30,11 @@ import Foundation
 import Segment
 import UIKit
 
+@objc(SEGAmplitudeSession)
+public class ObjCAmplitudeSession: NSObject, ObjCPlugin, ObjCPluginShim {
+    public func instance() -> EventPlugin { return AmplitudeSession() }
+}
+
 public class AmplitudeSession: EventPlugin, iOSLifecycle {
     public var key = "Actions Amplitude"
     public var type = PluginType.enrichment