Disable code coverage for Release (#33)

Author: sebskuse

Differ.xcodeproj/project.pbxproj

@@ -466,6 +466,7 @@
 			baseConfigurationReference = 900E039F1DE7C3370033A799 /* Universal-Framework-Target.xcconfig */;
 			buildSettings = {
 				APPLICATION_EXTENSION_API_ONLY = YES;
+				CLANG_ENABLE_CODE_COVERAGE = NO;
 				DEFINES_MODULE = YES;
 				DYLIB_COMPATIBILITY_VERSION = 1;
 				DYLIB_CURRENT_VERSION = 1;