Update macOS target to Swift 5

Author: sxg

ForecastIO.xcodeproj/project.pbxproj

@@ -604,12 +604,12 @@
 					};
 					D4446E6F1C51538000FBC8A8 = {
 						CreatedOnToolsVersion = 7.2;
-						LastSwiftMigration = 1020;
+						LastSwiftMigration = 1030;
 					};
 					D4446E781C51538000FBC8A8 = {
 						CreatedOnToolsVersion = 7.2;
 						DevelopmentTeam = 76333YNXLE;
-						LastSwiftMigration = 1000;
+						LastSwiftMigration = 1030;
 						ProvisioningStyle = Manual;
 					};
 					D4A480641C507CE70053EB05 = {
@@ -1362,7 +1362,7 @@
 				SDKROOT = macosx;
 				SKIP_INSTALL = YES;
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
-				SWIFT_VERSION = 4.2;
+				SWIFT_VERSION = 5.0;
 				VERSIONING_SYSTEM = "apple-generic";
 				VERSION_INFO_PREFIX = "";
 			};
@@ -1400,7 +1400,7 @@
 				SDKROOT = macosx;
 				SKIP_INSTALL = YES;
 				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
-				SWIFT_VERSION = 4.2;
+				SWIFT_VERSION = 5.0;
 				VERSIONING_SYSTEM = "apple-generic";
 				VERSION_INFO_PREFIX = "";
 			};
@@ -1430,7 +1430,7 @@
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SDKROOT = macosx;
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
-				SWIFT_VERSION = 4.2;
+				SWIFT_VERSION = 5.0;
 			};
 			name = Debug;
 		};
@@ -1459,7 +1459,7 @@
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SDKROOT = macosx;
 				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
-				SWIFT_VERSION = 4.2;
+				SWIFT_VERSION = 5.0;
 			};
 			name = Release;
 		};