Update project for Xcode 13

Author: emsquared

Configurations/Build/Common/Foundation.xcconfig

@@ -74,7 +74,6 @@ MACOSX_DEPLOYMENT_TARGET = 10.12
 ONLY_ACTIVE_ARCH = NO
 OTHER_CFLAGS = -Xclang -fobjc-runtime-has-weak
 PLIST_FILE_OUTPUT_FORMAT = binary
-PRESERVE_DEAD_CODE_INITS_AND_TERMS = NO
 PRODUCT_BUNDLE_IDENTIFIER =
 REMOVE_HEADERS_FROM_EMBEDDED_BUNDLES = YES
 RUN_CLANG_STATIC_ANALYZER = NO

Sources/App/Textual App.xcodeproj/project.pbxproj

@@ -3,7 +3,7 @@
 	archiveVersion = 1;
 	classes = {
 	};
-	objectVersion = 46;
+	objectVersion = 53;
 	objects = {
 
 /* Begin PBXAggregateTarget section */
@@ -6234,7 +6234,8 @@
 		4C1DC5491580420500A47BC9 /* Project object */ = {
 			isa = PBXProject;
 			attributes = {
-				LastUpgradeCheck = 1250;
+				BuildIndependentTargetsInParallel = YES;
+				LastUpgradeCheck = 1300;
 				ORGANIZATIONNAME = "Codeux Software, LLC";
 				TargetAttributes = {
 					4C0BA4F81990798800857343 = {

Sources/App/Textual App.xcodeproj/xcshareddata/xcschemes/Textual (App Store).xcscheme

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1250"
+   LastUpgradeVersion = "1300"
    version = "1.7">
    <BuildAction
       parallelizeBuildables = "NO"

Sources/App/Textual App.xcodeproj/xcshareddata/xcschemes/Textual (Debug).xcscheme

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1250"
+   LastUpgradeVersion = "1300"
    version = "1.7">
    <BuildAction
       parallelizeBuildables = "NO"

Sources/App/Textual App.xcodeproj/xcshareddata/xcschemes/Textual (Standard Release Sandboxed).xcscheme

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1250"
+   LastUpgradeVersion = "1300"
    version = "1.7">
    <BuildAction
       parallelizeBuildables = "NO"

Sources/App/Textual App.xcodeproj/xcshareddata/xcschemes/Textual (Standard Release).xcscheme

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1250"
+   LastUpgradeVersion = "1300"
    version = "1.7">
    <BuildAction
       parallelizeBuildables = "YES"

XPC Services/Historic Log File Manager/Historic Log File Manager.xcodeproj/project.pbxproj

@@ -347,7 +347,7 @@
 		4C442C801E13B3D200B187F4 /* Project object */ = {
 			isa = PBXProject;
 			attributes = {
-				LastUpgradeCheck = 1250;
+				LastUpgradeCheck = 1300;
 				ORGANIZATIONNAME = "Codeux Software, LLC";
 				TargetAttributes = {
 					4C442C871E13B3D200B187F4 = {

XPC Services/IRC Remote Connection Manager/IRC Remote Connection Manager.xcodeproj/project.pbxproj

@@ -481,7 +481,7 @@
 		4C14063A1F11942B00C73D53 /* Project object */ = {
 			isa = PBXProject;
 			attributes = {
-				LastUpgradeCheck = 1250;
+				LastUpgradeCheck = 1300;
 				ORGANIZATIONNAME = "Codeux Software, LLC";
 				TargetAttributes = {
 					4C1406411F11942B00C73D53 = {

XPC Services/Inline Content Loader/Inline Content Loader.xcodeproj/project.pbxproj

@@ -594,7 +594,7 @@
 		4C14063A1F11942B00C73D53 /* Project object */ = {
 			isa = PBXProject;
 			attributes = {
-				LastUpgradeCheck = 1250;
+				LastUpgradeCheck = 1300;
 				ORGANIZATIONNAME = "Codeux Software, LLC";
 				TargetAttributes = {
 					4C1406411F11942B00C73D53 = {