Disable SwiftLint 'force_cast' errors.

Author: danielrbrowne

Sources/PusherChannel.swift

@@ -157,6 +157,7 @@ open class PusherChannel: NSObject {
     open func handleEvent(event: PusherEvent) {
         if let eventHandlerArray = self.eventHandlers[event.eventName] {
             for eventHandler in eventHandlerArray {
+                // swiftlint:disable:next force_cast
                 eventHandler.callback(event.copy() as! PusherEvent)
             }
         }

Sources/PusherGlobalChannel.swift

@@ -23,6 +23,7 @@ import Foundation
     */
     internal func handleGlobalEvent(event: PusherEvent) {
         for (_, callback) in self.globalCallbacks {
+            // swiftlint:disable:next force_cast
             callback(event.copy() as! PusherEvent)
         }
     }