Update keychain dependency

Carthage/Checkouts/KeychainAccess/Examples/Playground-iOS.playground/contents.xcplayground

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+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<playground version='3.0' sdk='iphonesimulator' auto-termination-delay='0'>
+    <sections>
+        <code source-file-name='section-1.swift'/>
+    </sections>
+    <timeline fileName='timeline.xctimeline'/>
+</playground>

Carthage/Checkouts/KeychainAccess/Examples/Playground-iOS.playground/section-1.swift

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+import UIKit
+import XCPlayground
+
+import KeychainAccess
+
+var keychain: Keychain
+
+/***************
+ * Instantiation
+ ***************/
+
+/* for Application Password */
+keychain = Keychain(service: "com.example.github-token")
+
+/* for Internet Password */
+let url = URL(string: "https://github.com")!
+keychain = Keychain(server: url, protocolType: .https)
+
+
+/**************
+ * Adding items
+ **************/
+
+/* subscripting */
+keychain["kishikawakatsumi"] = "01234567-89ab-cdef-0123-456789abcdef"
+
+/* set method */
+try? keychain.set("01234567-89ab-cdef-0123-456789abcdef", key: "kishikawakatsumi")
+
+
+/*****************
+ * Obtaining items
+ *****************/
+
+var token: String?
+/* subscripting (automatically convert to String) */
+token = keychain["kishikawakatsumi"]
+
+/* get method */
+
+// as String
+token = try! keychain.get("kishikawakatsumi")
+token = try! keychain.getString("kishikawakatsumi")
+
+// as Data
+let data = try! keychain.getData("kishikawakatsumi")
+
+/****************
+ * Removing items
+ ****************/
+
+/* subscripting */
+keychain["kishikawakatsumi"] = nil
+
+/* remove method */
+try? keychain.remove("kishikawakatsumi")
+
+
+/****************
+ * Error handling
+ ****************/
+
+/* set */
+do {
+    try keychain.set("01234567-89ab-cdef-0123-456789abcdef", key: "kishikawakatsumi")
+} catch let error {
+    print("error: \(error.localizedDescription)")
+}
+
+/* get */
+// First, get the failable (value or error) object
+do {
+    let token = try keychain.get("kishikawakatsumi")
+} catch let error {
+    print("error: \(error.localizedDescription)")
+}
+
+/* remove */
+do {
+    try keychain.remove("kishikawakatsumi")
+} catch let error {
+    print("error: \(error.localizedDescription)")
+}
+
+
+/*******************
+ * Label and Comment
+ *******************/
+
+keychain = Keychain(server: URL(string: "https://github.com")!, protocolType: .https)
+    .label("github.com (kishikawakatsumi)")
+    .comment("github access token")
+
+
+/***************
+ * Configuration
+ ***************/
+
+/* for background application */
+let background = Keychain(service: "com.example.github-token")
+    .accessibility(.afterFirstUnlock)
+
+/* for forground application */
+let forground = Keychain(service: "com.example.github-token")
+    .accessibility(.whenUnlocked)
+
+/* Sharing Keychain Items */
+let shared = Keychain(service: "com.example.github-token", accessGroup: "12ABCD3E4F.shared")
+
+/* Synchronizing Keychain items with iCloud */
+let iCloud = Keychain(service: "com.example.github-token")
+    .synchronizable(true)
+
+/* One-Shot configuration change */
+
+try? keychain
+    .accessibility(.afterFirstUnlock)
+    .synchronizable(true)
+    .set("01234567-89ab-cdef-0123-456789abcdef", key: "kishikawakatsumi")
+
+try? keychain
+    .accessibility(.whenUnlocked)
+    .set("01234567-89ab-cdef-0123-456789abcdef", key: "kishikawakatsumi")
+
+
+/***********
+ * Debugging
+ ***********/
+
+/* Display all stored items if print keychain object */
+keychain = Keychain(server: URL(string: "https://github.com")!, protocolType: .https)
+print("\(keychain)")
+
+/* Obtaining all stored keys */
+let keys = keychain.allKeys()
+for key in keys {
+    print("key: \(key)")
+}
+
+/* Obtaining all stored items */
+let items = keychain.allItems()
+for item in items {
+    print("item: \(item)")
+}