Fix project settings for Xcode 12 to be able to import Gridicon.framework

Author: SergioEstevao

Example/AztecExample.xcodeproj/project.pbxproj

@@ -614,6 +614,7 @@
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
 				SWIFT_SWIFT3_OBJC_INFERENCE = Off;
 				SWIFT_VERSION = 4.0;
+				VALIDATE_WORKSPACE = YES;
 			};
 			name = Debug;
 		};
@@ -667,6 +668,7 @@
 				SWIFT_SWIFT3_OBJC_INFERENCE = Off;
 				SWIFT_VERSION = 4.0;
 				VALIDATE_PRODUCT = YES;
+				VALIDATE_WORKSPACE = YES;
 			};
 			name = Release;
 		};
@@ -829,6 +831,7 @@
 				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
 				SWIFT_SWIFT3_OBJC_INFERENCE = Off;
 				SWIFT_VERSION = 4.0;
+				VALIDATE_WORKSPACE = YES;
 			};
 			name = Profiling;
 		};
@@ -912,6 +915,7 @@
 				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
 				SWIFT_SWIFT3_OBJC_INFERENCE = Off;
 				SWIFT_VERSION = 4.0;
+				VALIDATE_WORKSPACE = YES;
 			};
 			name = "Release-Alpha";
 		};