Fix UIStackView Label Issue

Fixes issue where SkeletonView sets the text of each label to nil, UIStackView sets the height of each label to 0 and lays them out on top of each other.

Sources/Helpers/PrepareForSkeletonProtocol.swift

@@ -14,14 +14,14 @@ protocol PrepareForSkeleton {
 
 extension UILabel: PrepareForSkeleton {
     func prepareViewForSkeleton() {
-        text = nil
+        text = " "
         resignFirstResponder()
     }
 }
 
 extension UITextView: PrepareForSkeleton {
     func prepareViewForSkeleton() {
-        text = nil
+        text = " "
         resignFirstResponder()
     }
 }

Sources/Recoverable/Recoverable.swift

@@ -40,7 +40,7 @@ extension UILabel {
     
     override func recoverViewState(forced: Bool) {
         super.recoverViewState(forced: forced)
-        text = text == "" || forced ? viewState?.text : text
+        text = text == " " || forced ? viewState?.text : text
     }
 }
 
@@ -52,7 +52,7 @@ extension UITextView {
     
     override func recoverViewState(forced: Bool) {
         super.recoverViewState(forced: forced)
-        text = text == "" || forced ? viewState?.text : text
+        text = text == " " || forced ? viewState?.text : text
     }
 }