Make compatible with RxSwift 4.4.0 and Xcode 10.1

Cartfile

@@ -1 +1 @@
-github "ReactiveX/RxSwift" ~> 4.3.1
+github "ReactiveX/RxSwift" ~> 4.4.0

Cartfile.resolved

@@ -1 +1 @@
-github "ReactiveX/RxSwift" "4.3.1"
+github "ReactiveX/RxSwift" "4.4.0"

Package.resolved

@@ -6,8 +6,8 @@
         "repositoryURL": "https://github.com/ReactiveX/RxSwift.git",
         "state": {
           "branch": null,
-          "revision": "0df62b4d562f8620d4b795b18e4adf0b631527a1",
-          "version": "4.3.1"
+          "revision": "e8aa1d892a0d8a153a28b74cbad25be534926f49",
+          "version": "4.4.0"
         }
       }
     ]

Package.swift

@@ -8,7 +8,7 @@ let package = Package(
     .library(name: "RxKeyboard", targets: ["RxKeyboard"]),
   ],
   dependencies: [
-    .package(url: "https://github.com/ReactiveX/RxSwift.git", .upToNextMajor(from: "4.3.0")),
+    .package(url: "https://github.com/ReactiveX/RxSwift.git", .upToNextMajor(from: "4.4.0")),
   ],
   targets: [
     .target(name: "RxKeyboard", dependencies: ["RxSwift", "RxCocoa"]),

RxKeyboard.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name             = 'RxKeyboard'
-  s.version          = '0.9.1'
+  s.version          = '0.9.2'
   s.summary          = 'Reactive Keyboard in iOS'
   s.homepage         = 'https://github.com/RxSwiftCommunity/RxKeyboard'
   s.license          = { :type => 'MIT', :file => 'LICENSE' }
@@ -11,8 +11,8 @@ Pod::Spec.new do |s|
   s.frameworks       = 'UIKit', 'Foundation'
   s.requires_arc     = true
 
-  s.dependency 'RxSwift', '>= 4.3.1'
-  s.dependency 'RxCocoa', '>= 4.3.1'
+  s.dependency 'RxSwift', '>= 4.4.0'
+  s.dependency 'RxCocoa', '>= 4.4.0'
 
   s.ios.deployment_target = '8.0'
 end