Make it macOS 10.9 compatible

Author: toadzky

Reactor.xcodeproj/project.pbxproj

@@ -284,7 +284,7 @@
 				ENABLE_NS_ASSERTIONS = YES;
 				GCC_OPTIMIZATION_LEVEL = 0;
 				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
-				MACOSX_DEPLOYMENT_TARGET = 10.10;
+				MACOSX_DEPLOYMENT_TARGET = 10.9;
 				ONLY_ACTIVE_ARCH = YES;
 				OTHER_SWIFT_FLAGS = "-DXcode";
 				PRODUCT_NAME = "$(TARGET_NAME)";
@@ -305,7 +305,7 @@
 				DYLIB_INSTALL_NAME_BASE = "@rpath";
 				GCC_OPTIMIZATION_LEVEL = s;
 				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
-				MACOSX_DEPLOYMENT_TARGET = 10.10;
+				MACOSX_DEPLOYMENT_TARGET = 10.9;
 				OTHER_SWIFT_FLAGS = "-DXcode";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SUPPORTED_PLATFORMS = "macosx iphoneos iphonesimulator appletvos appletvsimulator watchos watchsimulator";

Sources/Reactor.swift

@@ -86,7 +86,7 @@ public struct Subscription<StateType: State> {
 
 public class Core<StateType: State> {
 
-    private let jobQueue:DispatchQueue = DispatchQueue(label: "reactor.core.queue", qos: .userInitiated, attributes: [])
+    private let jobQueue:DispatchQueue
 
     private let subscriptionsSyncQueue = DispatchQueue(label: "reactor.core.subscription.sync")
     private var _subscriptions = [Subscription<StateType>]()
@@ -116,6 +116,11 @@ public class Core<StateType: State> {
     public init(state: StateType, middlewares: [AnyMiddleware] = []) {
         self.state = state
         self.middlewares = middlewares.map(Middlewares.init)
+        if #available(macOS 10.10, *) {
+            self.jobQueue = DispatchQueue(label: "reactor.core.queue", qos: .userInitiated, attributes: [])
+        } else {
+            self.jobQueue = DispatchQueue(label: "reactor.core.queue", qos: .unspecified, attributes: [])
+        }
     }