Enforce Swift 5 use

Author: radianttap

JWT.xcodeproj/project.pbxproj

@@ -407,6 +407,9 @@
 					279D63A61AD07FFF0024E2BC = {
 						CreatedOnToolsVersion = 6.2;
 					};
+					CD9B62131C7753D8005D4844 = {
+						LastSwiftMigration = 1020;
+					};
 				};
 			};
 			buildConfigurationList = 279D63961AD07FFF0024E2BC /* Build configuration list for PBXProject "JWT" */;
@@ -684,7 +687,7 @@
 				SDKROOT = macosx;
 				SWIFT_INCLUDE_PATHS = "$(SRCROOT)";
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 5.0;
 				VERSIONING_SYSTEM = "apple-generic";
 				VERSION_INFO_PREFIX = "";
 			};
@@ -737,7 +740,7 @@
 				SDKROOT = macosx;
 				SWIFT_INCLUDE_PATHS = "$(SRCROOT)";
 				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 5.0;
 				VERSIONING_SYSTEM = "apple-generic";
 				VERSION_INFO_PREFIX = "";
 			};