Update iOS and macOS demo projects to Swift 4

Author: Erik Strottmann

Docs/DemoApps/MustacheDemoOSX/MustacheDemoOSX.xcodeproj/project.pbxproj

@@ -218,7 +218,7 @@
 				TargetAttributes = {
 					56E8B5601A8BE267000DCC81 = {
 						CreatedOnToolsVersion = 6.1.1;
-						LastSwiftMigration = 0800;
+						LastSwiftMigration = 0940;
 					};
 				};
 			};
@@ -463,6 +463,8 @@
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/../Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = "com.github.groue.$(PRODUCT_NAME:rfc1034identifier)";
 				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_SWIFT3_OBJC_INFERENCE = Default;
+				SWIFT_VERSION = 4.0;
 			};
 			name = Debug;
 		};
@@ -476,6 +478,8 @@
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/../Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = "com.github.groue.$(PRODUCT_NAME:rfc1034identifier)";
 				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_SWIFT3_OBJC_INFERENCE = Default;
+				SWIFT_VERSION = 4.0;
 			};
 			name = Release;
 		};

Docs/DemoApps/MustacheDemoOSX/MustacheDemoOSX/Model.swift

@@ -9,6 +9,6 @@
 import Cocoa
 
 class Model: NSObject {
-    dynamic var templateString: String = "Hello {{ name }}!"
-    dynamic var JSONString: String = "{\n  \"name\": \"Arthur\"\n}"
+    @objc dynamic var templateString: String = "Hello {{ name }}!"
+    @objc dynamic var JSONString: String = "{\n  \"name\": \"Arthur\"\n}"
 }

Docs/DemoApps/MustacheDemoiOS/MustacheDemoiOS.xcodeproj/project.pbxproj

@@ -221,6 +221,7 @@
 					56FD0F3D1AAED3C3005C55A7 = {
 						CreatedOnToolsVersion = 6.2;
 						DevelopmentTeam = AMD8W895CT;
+						LastSwiftMigration = 0940;
 					};
 				};
 			};
@@ -466,6 +467,8 @@
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = "com.github.groue.$(PRODUCT_NAME:rfc1034identifier)";
 				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_SWIFT3_OBJC_INFERENCE = Default;
+				SWIFT_VERSION = 4.0;
 			};
 			name = Debug;
 		};
@@ -479,6 +482,8 @@
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
 				PRODUCT_BUNDLE_IDENTIFIER = "com.github.groue.$(PRODUCT_NAME:rfc1034identifier)";
 				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_SWIFT3_OBJC_INFERENCE = Default;
+				SWIFT_VERSION = 4.0;
 			};
 			name = Release;
 		};