Don't use NSDictionary in definitions

Source/SocketIO/Engine/SocketEngine.swift

@@ -163,7 +163,7 @@ public final class SocketEngine : NSObject, URLSessionDelegate, SocketEnginePoll
     /// - parameter client: The client for this engine.
     /// - parameter url: The url for this engine.
     /// - parameter options: The options for this engine.
-    public convenience init(client: SocketEngineClient, url: URL, options: NSDictionary?) {
+    public convenience init(client: SocketEngineClient, url: URL, options: [String: Any]?) {
         self.init(client: client, url: url, config: options?.toSocketConfiguration() ?? [])
     }
 

Source/SocketIO/Engine/SocketEngineSpec.swift

@@ -90,7 +90,7 @@ import Starscream
     /// - parameter client: The client for this engine.
     /// - parameter url: The url for this engine.
     /// - parameter options: The options for this engine.
-    init(client: SocketEngineClient, url: URL, options: NSDictionary?)
+    init(client: SocketEngineClient, url: URL, options: [String: Any]?)
 
     /// Starts the connection to the server.
     func connect()

Source/SocketIO/Manager/SocketManager.swift

@@ -150,8 +150,8 @@ open class SocketManager : NSObject, SocketManagerSpec, SocketParsable, SocketDa
     /// - parameter socketURL: The url of the socket.io server.
     /// - parameter config: The config for this socket.
     @objc
-    public convenience init(socketURL: NSURL, config: NSDictionary?) {
-        self.init(socketURL: socketURL as URL, config: config?.toSocketConfiguration() ?? [])
+    public convenience init(socketURL: URL, config: [String: Any]?) {
+        self.init(socketURL: socketURL, config: config?.toSocketConfiguration() ?? [])
     }
 
     deinit {

Source/SocketIO/Util/SocketExtensions.swift

@@ -42,7 +42,7 @@ extension CharacterSet {
     }
 }
 
-extension NSDictionary {
+extension Dictionary where Key == String, Value == Any {
     private static func keyValueToSocketIOClientOption(key: String, value: Any) -> SocketIOClientOption? {
         switch (key, value) {
         case let ("connectParams", params as [String: Any]):
@@ -90,7 +90,7 @@ extension NSDictionary {
         var options = [] as SocketIOClientConfiguration
 
         for (rawKey, value) in self {
-            if let key = rawKey as? String, let opt = NSDictionary.keyValueToSocketIOClientOption(key: key, value: value) {
+            if let opt = Dictionary.keyValueToSocketIOClientOption(key: rawKey, value: value) {
                 options.insert(opt)
             }
         }

Tests/TestSocketIO/SocketSideEffectTest.swift

@@ -463,7 +463,7 @@ class TestEngine : SocketEngineSpec {
     private(set) var websocket = false
     private(set) var ws: WebSocket? = nil
 
-    required init(client: SocketEngineClient, url: URL, options: NSDictionary?) {
+    required init(client: SocketEngineClient, url: URL, options: [String: Any]?) {
         self.client = client
     }
 

Tests/TestSocketIOObjc/ManagerObjectiveCTest.m

@@ -11,6 +11,13 @@
 
 @implementation ManagerObjectiveCTest
 
+- (void)testSettingConfig {
+    NSURL* url = [[NSURL alloc] initWithString:@"http://localhost"];
+    self.manager = [[TestManager alloc] initWithSocketURL:url config:@{@"forceNew": @YES}];
+
+    XCTAssertTrue(self.manager.forceNew);
+}
+
 - (void)testManagerProperties {
     XCTAssertNotNil(self.manager.defaultSocket);
     XCTAssertNil(self.manager.engine);