Enabled APPLICATION_EXTENSION_API_ONLY so that Multiplexer can be used in app extensions/widgets

Author: crontab

Multiplexer.xcodeproj/project.pbxproj

@@ -328,6 +328,7 @@
 		36E8FDF12340CA0500E34B07 /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				APPLICATION_EXTENSION_API_ONLY = YES;
 				CLANG_ENABLE_MODULES = YES;
 				CODE_SIGN_STYLE = Automatic;
 				DEFINES_MODULE = YES;
@@ -355,6 +356,7 @@
 		36E8FDF22340CA0500E34B07 /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				APPLICATION_EXTENSION_API_ONLY = YES;
 				CLANG_ENABLE_MODULES = YES;
 				CODE_SIGN_STYLE = Automatic;
 				DEFINES_MODULE = YES;