Update to Swift 5.

Author: lucdion

Example/FlexLayoutSample.xcodeproj/project.pbxproj

@@ -373,7 +373,7 @@
 				ORGANIZATIONNAME = Mirego;
 				TargetAttributes = {
 					DF1F2A051F17D11700BA1B97 = {
-						LastSwiftMigration = 1010;
+						LastSwiftMigration = 1030;
 					};
 				};
 			};
@@ -644,7 +644,7 @@
 				INFOPLIST_FILE = "FlexLayoutSample/Supporting Files/Info.plist";
 				PRODUCT_BUNDLE_IDENTIFIER = com.lucdion.FlexLayoutSample;
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				SWIFT_VERSION = 4.2;
+				SWIFT_VERSION = 5.0;
 			};
 			name = Debug;
 		};
@@ -657,7 +657,7 @@
 				INFOPLIST_FILE = "FlexLayoutSample/Supporting Files/Info.plist";
 				PRODUCT_BUNDLE_IDENTIFIER = com.lucdion.FlexLayoutSample;
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				SWIFT_VERSION = 4.2;
+				SWIFT_VERSION = 5.0;
 			};
 			name = Release;
 		};

FlexLayout.xcodeproj/project.pbxproj

@@ -330,13 +330,13 @@
 				TargetAttributes = {
 					24DA37591EF843C500D1AB2F = {
 						CreatedOnToolsVersion = 8.3.2;
-						LastSwiftMigration = 1010;
+						LastSwiftMigration = 1030;
 						ProvisioningStyle = Manual;
 					};
 					24DA37621EF843C500D1AB2F = {
 						CreatedOnToolsVersion = 8.3.2;
 						DevelopmentTeam = F37Y9H9E46;
-						LastSwiftMigration = 1010;
+						LastSwiftMigration = 1030;
 						ProvisioningStyle = Automatic;
 					};
 				};
@@ -614,7 +614,7 @@
 				SKIP_INSTALL = YES;
 				SWIFT_OBJC_BRIDGING_HEADER = "";
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
-				SWIFT_VERSION = 4.2;
+				SWIFT_VERSION = 5.0;
 			};
 			name = Debug;
 		};
@@ -642,7 +642,7 @@
 				PROVISIONING_PROFILE_SPECIFIER = "";
 				SKIP_INSTALL = YES;
 				SWIFT_OBJC_BRIDGING_HEADER = "";
-				SWIFT_VERSION = 4.2;
+				SWIFT_VERSION = 5.0;
 			};
 			name = Release;
 		};
@@ -656,7 +656,7 @@
 				OTHER_LDFLAGS = "$(inherited)";
 				PRODUCT_BUNDLE_IDENTIFIER = com.lucdion.FlexLayoutTests;
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				SWIFT_VERSION = 4.2;
+				SWIFT_VERSION = 5.0;
 			};
 			name = Debug;
 		};
@@ -670,7 +670,7 @@
 				OTHER_LDFLAGS = "$(inherited)";
 				PRODUCT_BUNDLE_IDENTIFIER = com.lucdion.FlexLayoutTests;
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				SWIFT_VERSION = 4.2;
+				SWIFT_VERSION = 5.0;
 			};
 			name = Release;
 		};