Update + validate podspec

ARVideoKit.podspec

@@ -1,11 +1,11 @@
 Pod::Spec.new do |s|
   s.name         = "ARVideoKit"
-  s.version      = "1.5.51"
+  s.version      = "1.51"
   s.summary      = "Capture & record ARKit videos 📹, photos 🌄, Live Photos 🎇, and GIFs 🎆."
   s.description  = "Enabling developers to capture videos 📹, photos 🌄, Live Photos 🎇, and GIFs 🎆 with augmented reality components."
   s.homepage     = "https://github.com/AFathi/ARVideoKit"
   s.screenshots  = "http://www.ahmedbekhit.com/SK_PREV.gif", "http://www.ahmedbekhit.com/SCN_PREVIEW.gif"
-  s.swift_version = '5.0'
+  s.swift_version = '4.2'
 
 
   s.license      = { :type => "Apache 2.0", :file => "LICENSE" }
@@ -16,8 +16,8 @@ Pod::Spec.new do |s|
 
   s.platform     = :ios, "11.0"
 
-  # ARVideoKit for Swift 5.0
-  s.source       = { :git => "https://github.com/AFathi/ARVideoKit.git", :tag => "1.5.51" }
+  # ARVideoKit for Swift 4.2
+  s.source       = { :git => "https://github.com/AFathi/ARVideoKit.git", :tag => "1.51" }
   s.source_files  = "ARVideoKit", "ARVideoKit/**/*.{h,m,swift}"
   s.resources = "ARVideoKit/Assets/*.scnassets"
 end

ARVideoKit.xcodeproj/project.pbxproj

@@ -252,7 +252,7 @@
 				TargetAttributes = {
 					FBD604D91FA969DD00EC9804 = {
 						CreatedOnToolsVersion = 9.1;
-						LastSwiftMigration = 1020;
+						LastSwiftMigration = 0910;
 						ProvisioningStyle = Automatic;
 					};
 				};
@@ -263,7 +263,6 @@
 			hasScannedForEncodings = 0;
 			knownRegions = (
 				en,
-				Base,
 			);
 			mainGroup = FBD604D01FA969DD00EC9804;
 			productRefGroup = FBD604DB1FA969DD00EC9804 /* Products */;
@@ -463,7 +462,7 @@
 				PRODUCT_NAME = "$(TARGET_NAME:c99extidentifier)";
 				SKIP_INSTALL = YES;
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
-				SWIFT_VERSION = 5.0;
+				SWIFT_VERSION = 4.2;
 				TARGETED_DEVICE_FAMILY = "1,2";
 			};
 			name = Debug;
@@ -488,7 +487,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = com.ahmedbekhit.ARVideoKit;
 				PRODUCT_NAME = "$(TARGET_NAME:c99extidentifier)";
 				SKIP_INSTALL = YES;
-				SWIFT_VERSION = 5.0;
+				SWIFT_VERSION = 4.2;
 				TARGETED_DEVICE_FAMILY = "1,2";
 			};
 			name = Release;

ARVideoKit/Sources/RecordAR.swift

@@ -109,21 +109,6 @@ import PhotosUI
             }
         }
     }
-    /**
-     A boolean that indicates whether render engine should retain SCNTechnique used in the view. Default is `false`.
-     */
-    @objc public var retainTechnique: Bool = false {
-        didSet {
-            if retainTechnique {
-                guard let techniqueSupportingView = view as? SCNTechniqueSupport else {
-                    return
-                }
-                renderEngine?.technique = techniqueSupportingView.technique
-            } else {
-                renderEngine?.technique = nil
-            }
-        }
-    }
     
     //MARK: - Public initialization methods
     /**
@@ -731,7 +716,7 @@ import PhotosUI
      Recommended to use in the `UIViewController`'s method `func viewWillAppear(_ animated: Bool)`
      - parameter configuration: An object that defines motion and scene tracking behaviors for the session.
     */
-    @objc func prepare(_ configuration: ARConfiguration? = nil) {
+    @objc public func prepare(_ configuration: ARConfiguration? = nil) {
         ARcontentMode = contentMode
         onlyRenderWhileRec = onlyRenderWhileRecording
         if let view = view as? ARSCNView {
@@ -756,7 +741,7 @@ import PhotosUI
      
      Recommended to use in the `UIViewController`'s method `func viewWillDisappear(_ animated: Bool)`.
     */
-    @objc func rest() {
+    @objc public func rest() {
         ViewAR.orientation = UIInterfaceOrientationMask(ViewAR.orientations)
     }
 }

Examples/Swift/ARVideoKit-Example.xcodeproj/project.pbxproj

@@ -429,7 +429,7 @@
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = "com.ahmedbekhit.ARVideoKit-Example";
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				SWIFT_VERSION = 5.0;
+				SWIFT_VERSION = 4.2;
 				TARGETED_DEVICE_FAMILY = "1,2";
 			};
 			name = Debug;
@@ -451,7 +451,7 @@
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = "com.ahmedbekhit.ARVideoKit-Example";
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				SWIFT_VERSION = 5.0;
+				SWIFT_VERSION = 4.2;
 				TARGETED_DEVICE_FAMILY = "1,2";
 			};
 			name = Release;