Add PromiseKit dependency

- Added PromiseKit dependency

Carthage/Checkouts/PromiseKit/Tests/A+/2.3.4.swift

@@ -0,0 +1,26 @@
+import PromiseKit
+import XCTest
+
+
+class Test234: XCTestCase {
+    func test() {
+        describe("2.3.4: If `x` is not an object or function, fulfill `promise` with `x`") {
+            testFulfilled { promise, exception, _ in
+                promise.map { value -> UInt32 in
+                    return 1
+                }.done { value in
+                    XCTAssertEqual(value, 1)
+                    exception.fulfill()
+                }.silenceWarning()
+            }
+            testRejected { promise, expectation, _ in
+                promise.recover { _ -> Promise<UInt32> in
+                    return .value(UInt32(1))
+                }.done { value in
+                    XCTAssertEqual(value, 1)
+                    expectation.fulfill()
+                }.silenceWarning()
+            }
+        }
+    }
+}