'Cancel' for PromiseKit --

* update extensions to point at the latest version of PromiseKit in the pull request
* fix "generic parameter 'T' could not be inferred" compilation errors when using the new 'Promise' initializer that takes a cancellable task

Author: dougzilla32

Cartfile.resolved

@@ -1 +1 @@
-github "dougzilla32/PromiseKit" "5069bdc1b10847d47f5fdbe3accb623b3b1908a3"
+github "dougzilla32/PromiseKit" "dcf77e0afe55e3d18da9a2a5bda28cdf1adcb5a9"

Sources/MKDirections+Promise.swift

@@ -16,12 +16,12 @@ import PromiseKit
 extension MKDirections {
     /// Begins calculating the requested route information asynchronously.
     public func calculate() -> Promise<MKDirectionsResponse> {
-        return Promise(cancellableTask: MKDirectionsTask(self)) { calculate(completionHandler: $0.resolve) }
+        return Promise<MKDirectionsResponse>(cancellableTask: MKDirectionsTask(self)) { calculate(completionHandler: $0.resolve) }
     }
 
     /// Begins calculating the requested travel-time information asynchronously.
     public func calculateETA() -> Promise<MKETAResponse> {
-        return Promise(cancellableTask: MKDirectionsTask(self)) { calculateETA(completionHandler: $0.resolve) }
+        return Promise<MKETAResponse>(cancellableTask: MKDirectionsTask(self)) { calculateETA(completionHandler: $0.resolve) }
     }
 }
 

Sources/MKMapSnapshotter+Promise.swift

@@ -16,7 +16,7 @@ import PromiseKit
 extension MKMapSnapshotter {
     /// Starts generating the snapshot using the options set in this object.
     public func start() -> Promise<MKMapSnapshot> {
-        return Promise(cancellableTask: MKMapSnapshotterTask(self)) { start(completionHandler: $0.resolve) }
+        return Promise<MKMapSnapshot>(cancellableTask: MKMapSnapshotterTask(self)) { start(completionHandler: $0.resolve) }
     }
 }