Fix CI settings by setting deployment target 10.15

Author: anthonygelibert

QLColorCode.xcodeproj/project.pbxproj

@@ -675,7 +675,7 @@
 				GCC_WARN_UNUSED_PARAMETER = NO;
 				GCC_WARN_UNUSED_VARIABLE = YES;
 				INFOPLIST_FILE = Info.plist;
-				MACOSX_DEPLOYMENT_TARGET = 11.0;
+				MACOSX_DEPLOYMENT_TARGET = 10.15;
 				ONLY_ACTIVE_ARCH = YES;
 				PRODUCT_BUNDLE_IDENTIFIER = org.n8gray.qlcolorcode;
 				PRODUCT_NAME = QLColorCode;
@@ -740,7 +740,7 @@
 				GCC_WARN_UNUSED_PARAMETER = NO;
 				GCC_WARN_UNUSED_VARIABLE = YES;
 				INFOPLIST_FILE = Info.plist;
-				MACOSX_DEPLOYMENT_TARGET = 11.0;
+				MACOSX_DEPLOYMENT_TARGET = 10.15;
 				ONLY_ACTIVE_ARCH = YES;
 				PRODUCT_BUNDLE_IDENTIFIER = org.n8gray.qlcolorcode;
 				PRODUCT_NAME = QLColorCode;