Use fontLine for skeleton in labels (#427)

Co-authored-by: Ankit Agarwal <ankit.agarwal@naukri.com>

SkeletonView.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name         = "SkeletonView"
-  s.version      = "1.21.2"
+  s.version      = "1.22.0"
   s.summary      = "An elegant way to show users that something is happening and also prepare them to which contents he is waiting"
   s.description  = <<-DESC
   Today almost all apps have async processes, as API requests, long runing processes, etc. And while the processes are working, usually developers place a loading view to show users that something is going on.

Sources/Multilines/UILabel+Multiline.swift

@@ -29,7 +29,13 @@ public extension UILabel {
 
 extension UILabel: ContainsMultilineText {    
     var lineHeight: CGFloat {
-        backupHeightConstraints.first?.constant ?? SkeletonAppearance.default.multilineHeight
+        if let fontLineHeight = font?.lineHeight {
+            if let heightConstraints = backupHeightConstraints.first?.constant {
+                return (fontLineHeight > heightConstraints) ? heightConstraints : fontLineHeight
+            }
+            return fontLineHeight
+        }
+        return SkeletonAppearance.default.multilineHeight
     }
     
     var lastLineFillingPercent: Int {