Properly reference NSPrincipalClass and update project to recommended settings

Author: bryanforbes

Info.plist

@@ -17,6 +17,6 @@
 	<key>MinimumTextualVersion</key>
 	<string>6.0.0</string>
 	<key>NSPrincipalClass</key>
-	<string>TPI_SwiftPluginExample</string>
+	<string>$(PRODUCT_NAME).TPI_SwiftPluginExample</string>
 </dict>
 </plist>

SwiftPluginExample.xcodeproj/project.pbxproj

@@ -111,7 +111,7 @@
 			isa = PBXProject;
 			attributes = {
 				LastSwiftUpdateCheck = 0700;
-				LastUpgradeCheck = 0800;
+				LastUpgradeCheck = 0820;
 				TargetAttributes = {
 					8D57630D048677EA00EA77CD = {
 						LastSwiftMigration = 0800;
@@ -205,7 +205,9 @@
 				CLANG_WARN_CONSTANT_CONVERSION = YES;
 				CLANG_WARN_EMPTY_BODY = YES;
 				CLANG_WARN_ENUM_CONVERSION = YES;
+				CLANG_WARN_INFINITE_RECURSION = YES;
 				CLANG_WARN_INT_CONVERSION = YES;
+				CLANG_WARN_SUSPICIOUS_MOVE = YES;
 				CLANG_WARN_UNREACHABLE_CODE = YES;
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
@@ -230,7 +232,9 @@
 				CLANG_WARN_CONSTANT_CONVERSION = YES;
 				CLANG_WARN_EMPTY_BODY = YES;
 				CLANG_WARN_ENUM_CONVERSION = YES;
+				CLANG_WARN_INFINITE_RECURSION = YES;
 				CLANG_WARN_INT_CONVERSION = YES;
+				CLANG_WARN_SUSPICIOUS_MOVE = YES;
 				CLANG_WARN_UNREACHABLE_CODE = YES;
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;

SwiftPluginExample.xcodeproj/xcshareddata/xcschemes/SwiftPluginExample.xcscheme

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "0800"
+   LastUpgradeVersion = "0820"
    version = "2.0">
    <BuildAction
       parallelizeBuildables = "YES"