Fix SPM Support for Xcode 11

Package.swift

@@ -1,4 +1,4 @@
-// swift-tools-version:5.0
+// swift-tools-version:5.1
 import PackageDescription
 
 // Note: SPM support is broken until we can add dependency on UIKit.
@@ -15,5 +15,5 @@ let package = Package(
         sources: ["Sources"]
       )
     ],
-    swiftLanguageVersions: [3, 4, 5]
+    swiftLanguageVersions: [.v4_2, .v5]
 )

Sources/Storyboard/StoryboardBased.swift

@@ -15,13 +15,14 @@ import UIKit
 ///  * this ViewController is the initialViewController of your Storyboard
 ///
 /// to be able to instantiate them from the Storyboard in a type-safe manner
+@available(iOS 10.0, *)
 public protocol StoryboardBased: class {
   /// The UIStoryboard to use when we want to instantiate this ViewController
   static var sceneStoryboard: UIStoryboard { get }
 }
 
 // MARK: Default Implementation
-
+@available(iOS 10.0, *)
 public extension StoryboardBased {
   /// By default, use the storybaord with the same name as the class
   static var sceneStoryboard: UIStoryboard {
@@ -30,7 +31,7 @@ public extension StoryboardBased {
 }
 
 // MARK: Support for instantiation from Storyboard
-
+@available(iOS 10.0, *)
 public extension StoryboardBased where Self: UIViewController {
   /**
    Create an instance of the ViewController from its associated Storyboard's initialViewController

Sources/Storyboard/StoryboardSceneBased.swift

@@ -17,6 +17,7 @@ import UIKit
 /// to be able to instantiate them from the Storyboard in a type-safe manner.
 ///
 /// You need to implement `sceneStoryboard` yourself to indicate the UIStoryboard this scene is from.
+@available(iOS 10.0, *)
 public protocol StoryboardSceneBased: class {
   /// The UIStoryboard to use when we want to instantiate this ViewController
   static var sceneStoryboard: UIStoryboard { get }
@@ -25,7 +26,7 @@ public protocol StoryboardSceneBased: class {
 }
 
 // MARK: Default Implementation
-
+@available(iOS 10.0, *)
 public extension StoryboardSceneBased {
   /// By default, use the `sceneIdentifier` with the same name as the class
   static var sceneIdentifier: String {
@@ -34,7 +35,7 @@ public extension StoryboardSceneBased {
 }
 
 // MARK: Support for instantiation from Storyboard
-
+@available(iOS 10.0, *)
 public extension StoryboardSceneBased where Self: UIViewController {
   /**
    Create an instance of the ViewController from its associated Storyboard and the

Sources/View/NibLoadable.swift

@@ -15,13 +15,15 @@ import UIKit
 ///  * this class is used as the XIB's root view
 ///
 /// to be able to instantiate them from the NIB in a type-safe manner
+@available(iOS 10.0, *)
 public protocol NibLoadable: class {
   /// The nib file to use to load a new instance of the View designed in a XIB
   static var nib: UINib { get }
 }
 
 // MARK: Default implementation
 
+@available(iOS 10.0, *)
 public extension NibLoadable {
   /// By default, use the nib which have the same name as the name of the class,
   /// and located in the bundle of that class
@@ -31,7 +33,7 @@ public extension NibLoadable {
 }
 
 // MARK: Support for instantiation from NIB
-
+@available(iOS 10.0, *)
 public extension NibLoadable where Self: UIView {
   /**
    Returns a `UIView` object instantiated from nib

Sources/View/NibOwnerLoadable.swift

@@ -15,13 +15,14 @@ import UIKit
 ///  * this class is used as the XIB's File's Owner
 ///
 /// to be able to instantiate them from the NIB in a type-safe manner
+@available(iOS 10.0, *)
 public protocol NibOwnerLoadable: class {
   /// The nib file to use to load a new instance of the View designed in a XIB
   static var nib: UINib { get }
 }
 
 // MARK: Default implementation
-
+@available(iOS 10.0, *)
 public extension NibOwnerLoadable {
   /// By default, use the nib which have the same name as the name of the class,
   /// and located in the bundle of that class
@@ -31,7 +32,7 @@ public extension NibOwnerLoadable {
 }
 
 // MARK: Support for instantiation from NIB
-
+@available(iOS 10.0, *)
 public extension NibOwnerLoadable where Self: UIView {
   /**
    Adds content loaded from the nib to the end of the receiver's list of subviews and adds constraints automatically.

Sources/View/Reusable.swift

@@ -13,6 +13,7 @@ import UIKit
 /// Make your `UITableViewCell` and `UICollectionViewCell` subclasses
 /// conform to this protocol when they are *not* NIB-based but only code-based
 /// to be able to dequeue them in a type-safe manner
+@available(iOS 10.0, *)
 public protocol Reusable: class {
   /// The reuse identifier to use when registering and later dequeuing a reusable cell
   static var reuseIdentifier: String { get }
@@ -21,10 +22,12 @@ public protocol Reusable: class {
 /// Make your `UITableViewCell` and `UICollectionViewCell` subclasses
 /// conform to this typealias when they *are* NIB-based
 /// to be able to dequeue them in a type-safe manner
+@available(iOS 10.0, *)
 public typealias NibReusable = Reusable & NibLoadable
 
 // MARK: - Default implementation
 
+@available(iOS 10.0, *)
 public extension Reusable {
   /// By default, use the name of the class as String for its reuseIdentifier
   static var reuseIdentifier: String {

Sources/View/UICollectionView+Reusable.swift

@@ -10,6 +10,7 @@ import UIKit
 
 // MARK: Reusable support for UICollectionView
 
+@available(iOS 10.0, *)
 public extension UICollectionView {
   /**
    Register a NIB-Based `UICollectionViewCell` subclass (conforming to `Reusable` & `NibLoadable`)

Sources/View/UITableView+Reusable.swift

@@ -9,7 +9,7 @@
 import UIKit
 
 // MARK: Reusable support for UITableView
-
+@available(iOS 10.0, *)
 public extension UITableView {
   /**
    Register a NIB-Based `UITableViewCell` subclass (conforming to `Reusable` & `NibLoadable`)