Merge pull request #719 from ReactiveCocoa/xcode-10-2-warnings

Fix Xcode 10.2 warnings

Author: mdiep

ReactiveSwift.xcodeproj/project.pbxproj

@@ -783,11 +783,11 @@
 					};
 					D04725E919E49ED7006002AA = {
 						CreatedOnToolsVersion = 6.1;
-						LastSwiftMigration = 0800;
+						LastSwiftMigration = 1020;
 					};
 					D04725F419E49ED7006002AA = {
 						CreatedOnToolsVersion = 6.1;
-						LastSwiftMigration = 0800;
+						LastSwiftMigration = 1020;
 					};
 					D047260B19E49F82006002AA = {
 						CreatedOnToolsVersion = 6.1;
@@ -801,7 +801,7 @@
 			};
 			buildConfigurationList = D04725E419E49ED7006002AA /* Build configuration list for PBXProject "ReactiveSwift" */;
 			compatibilityVersion = "Xcode 3.2";
-			developmentRegion = English;
+			developmentRegion = en;
 			hasScannedForEncodings = 0;
 			knownRegions = (
 				en,