update to new protocol methods for escaping and optional JWT token

FlatNetworkClient.podspec

@@ -8,7 +8,7 @@
 Pod::Spec.new do |s|
 
   s.name         = "FlatNetworkClient"
-  s.version      = "1.0.0"
+  s.version      = "1.1.0"
   s.summary      = "Swifty wrapper around URLSession"
 
   s.description  = <<-DESC

FlatNetworkClient/FlatNetworkClient.swift

@@ -2,9 +2,8 @@ import Foundation
 
 open class NetworkClient: NSObject, NetworkConnectable {
 
-    public var getJWT: (() -> String)?
-    public var refreshJWT: ((() -> Void) -> Void)?
-
+    open var getJWT: (() -> String?)?
+    open var refreshJWT: ((@escaping () -> Void) -> Void)?
     open var tasks = [String: URLSessionTask]()
 
     open var session: URLSessionInjectable = {
@@ -43,12 +42,11 @@ open class NetworkClient: NSObject, NetworkConnectable {
     }
 
     private func execute<A>(_ endPoint: EndpointCreator, type: A.Type?, completion: @escaping (A?, Error?) -> Void) where A: JsonCreatable {
-
         if !endPoint.jwtRequired || isJWTValid() {
             performNetworkCall(endPoint, completion, type)
         } else {
             refreshJWT? {
-                performNetworkCall(endPoint, completion, type)
+                self.performNetworkCall(endPoint, completion, type)
             }
         }
     }

FlatNetworkClient/NetworkProtocols.swift

@@ -5,8 +5,8 @@ public typealias NetworkResult = (Data?, Error?) -> Void
 public protocol NetworkConnectable {
     var tasks: [String: URLSessionTask] { get set }
     var session: URLSessionInjectable { get set }
-    var refreshJWT: ((() -> Void) -> Void)? { get set }
-    var getJWT: (() -> String)? { get set }
+    var refreshJWT: ((@escaping () -> Void) -> Void)? { get set }
+    var getJWT: (() -> String?)? { get set }
 
     func get<A>(_ endPoint: EndpointCreator, type: A.Type?, completion: @escaping (A?, Error?) -> Void) where A: JsonCreatable
     func post<A>(_ endPoint: EndpointCreator, type: A.Type?, completion: @escaping (A?, Error?) -> Void) where A: JsonCreatable