Upgrade version of RxSwift, RxCocoa, Alamofire.

Pods/RxSwift/Platform/DataStructures/Bag.swift

@@ -80,15 +80,11 @@ struct Bag<T> : CustomDebugStringConvertible {
         }
 
         if _pairs.count < arrayDictionaryMaxSize {
-            _pairs.append(key: key, value: element)
+            _pairs.append((key: key, value: element))
             return key
         }
-
-        if _dictionary == nil {
-            _dictionary = [:]
-        }
-
-        _dictionary![key] = element
+        
+        _dictionary = [key: element]
         
         return key
     }