Accept Xcode 12.2 changes and settings recommendations

- Updated upgrade versions in project and scheme files
- Added warning for quoted includes in framework headers
- Added CODE_SIGN_IDENTITY of - to sign locally
  (Note that is the SDK default when no team is set as well.
   But Xcode seems to *really* want this to be set at the target level.)

Author: dempseyatgithub

BuildSettingExtractor.xcodeproj/project.pbxproj

@@ -299,7 +299,7 @@
 		53719E8719BF4C6D005D3DE0 /* Project object */ = {
 			isa = PBXProject;
 			attributes = {
-				LastUpgradeCheck = 1160;
+				LastUpgradeCheck = 1220;
 				ORGANIZATIONNAME = "Tapas Software";
 				TargetAttributes = {
 					53719EAF19BF4C6D005D3DE0 = {
@@ -452,6 +452,7 @@
 				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
 				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
 				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
+				CLANG_WARN_QUOTED_INCLUDE_IN_FRAMEWORK_HEADER = YES;
 				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
 				CLANG_WARN_STRICT_PROTOTYPES = YES;
 				CLANG_WARN_SUSPICIOUS_MOVE = YES;
@@ -505,6 +506,7 @@
 				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
 				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
 				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
+				CLANG_WARN_QUOTED_INCLUDE_IN_FRAMEWORK_HEADER = YES;
 				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
 				CLANG_WARN_STRICT_PROTOTYPES = YES;
 				CLANG_WARN_SUSPICIOUS_MOVE = YES;
@@ -533,6 +535,7 @@
 			buildSettings = {
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CODE_SIGN_ENTITLEMENTS = BuildSettingExtractor/BuildSettingExtractor.entitlements;
+				CODE_SIGN_IDENTITY = "-";
 				COMBINE_HIDPI_IMAGES = YES;
 				CURRENT_PROJECT_VERSION = 17;
 				ENABLE_HARDENED_RUNTIME = YES;
@@ -549,6 +552,7 @@
 			buildSettings = {
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CODE_SIGN_ENTITLEMENTS = BuildSettingExtractor/BuildSettingExtractor.entitlements;
+				CODE_SIGN_IDENTITY = "-";
 				COMBINE_HIDPI_IMAGES = YES;
 				CURRENT_PROJECT_VERSION = 17;
 				ENABLE_HARDENED_RUNTIME = YES;

BuildSettingExtractor.xcodeproj/xcshareddata/xcschemes/BuildSettingExtractor.xcscheme

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1160"
+   LastUpgradeVersion = "1220"
    version = "1.7">
    <BuildAction
       parallelizeBuildables = "YES"