Make tests pass on Swift 5.1

Author: Kuniwak

.gitmodules

@@ -1,24 +1,12 @@
 [submodule "Carthage/Checkouts/R.swift.Library"]
 	path = Carthage/Checkouts/R.swift.Library
 	url = https://github.com/mac-cain13/R.swift.Library.git
-[submodule "Carthage/Checkouts/XLPagerTabStrip"]
-	path = Carthage/Checkouts/XLPagerTabStrip
-	url = https://github.com/xmartlabs/XLPagerTabStrip.git
 [submodule "Carthage/Checkouts/RxSwift"]
 	path = Carthage/Checkouts/RxSwift
 	url = https://github.com/ReactiveX/RxSwift.git
 [submodule "Carthage/Checkouts/MirrorDiffKit"]
 	path = Carthage/Checkouts/MirrorDiffKit
 	url = https://github.com/Kuniwak/MirrorDiffKit.git
-[submodule "Carthage/Checkouts/Unbox"]
-	path = Carthage/Checkouts/Unbox
-	url = https://github.com/JohnSundell/Unbox.git
 [submodule "Carthage/Checkouts/PromiseKit"]
 	path = Carthage/Checkouts/PromiseKit
 	url = https://github.com/mxcl/PromiseKit.git
-[submodule "Carthage/Checkouts/KeychainAccess"]
-	path = Carthage/Checkouts/KeychainAccess
-	url = https://github.com/kishikawakatsumi/KeychainAccess.git
-[submodule "Carthage/Checkouts/Result"]
-	path = Carthage/Checkouts/Result
-	url = https://github.com/antitypical/Result.git

Cartfile

@@ -1,6 +1,4 @@
-github "mac-cain13/R.swift.Library" ~> 4.0.0
-github "ReactiveX/RxSwift" "master"
-github "Kuniwak/MirrorDiffKit" ~> 2.0.0
-github "JohnSundell/Unbox" ~> 2.5.0
-github "mxcl/PromiseKit" ~> 4.3.2
-github "antitypical/Result" ~> 3.2.4
+github "mac-cain13/R.swift.Library"
+github "ReactiveX/RxSwift"
+github "Kuniwak/MirrorDiffKit"
+github "mxcl/PromiseKit"

Cartfile.resolved

@@ -1,6 +1,4 @@
-github "JohnSundell/Unbox" "2.5.0"
-github "Kuniwak/MirrorDiffKit" "2.0.0"
-github "ReactiveX/RxSwift" "f043778214c8f182018ccdfbf7f440edbe0aecc8"
-github "antitypical/Result" "3.2.4"
-github "mac-cain13/R.swift.Library" "v4.0.0"
-github "mxcl/PromiseKit" "4.5.0"
+github "Kuniwak/MirrorDiffKit" "5.0.1"
+github "ReactiveX/RxSwift" "5.0.1"
+github "mac-cain13/R.swift.Library" "v5.1.0"
+github "mxcl/PromiseKit" "6.13.1"