Updated to Xcode 11
diff --git a/GCDWebServer.xcodeproj/project.pbxproj b/GCDWebServer.xcodeproj/project.pbxproj
index d4780d7..7ce499a 100644
--- a/GCDWebServer.xcodeproj/project.pbxproj
+++ b/GCDWebServer.xcodeproj/project.pbxproj
@@ -838,7 +838,7 @@
 		08FB7793FE84155DC02AAC07 /* Project object */ = {
 			isa = PBXProject;
 			attributes = {
-				LastUpgradeCheck = 1030;
+				LastUpgradeCheck = 1130;
 				TargetAttributes = {
 					CEE28CD01AE004D800F4023C = {
 						CreatedOnToolsVersion = 6.3;
diff --git "a/GCDWebServer.xcodeproj/xcshareddata/xcschemes/GCDWebServers \050Mac\051.xcscheme" "b/GCDWebServer.xcodeproj/xcshareddata/xcschemes/GCDWebServers \050Mac\051.xcscheme"
index aae0b64..f366881 100644
--- "a/GCDWebServer.xcodeproj/xcshareddata/xcschemes/GCDWebServers \050Mac\051.xcscheme"
+++ "b/GCDWebServer.xcodeproj/xcshareddata/xcschemes/GCDWebServers \050Mac\051.xcscheme"
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1030"
+   LastUpgradeVersion = "1130"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"
@@ -26,8 +26,8 @@
       buildConfiguration = "Debug"
       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
-      enableAddressSanitizer = "YES"
-      shouldUseLaunchSchemeArgsEnv = "YES">
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      enableAddressSanitizer = "YES">
       <Testables>
          <TestableReference
             skipped = "NO">
@@ -40,8 +40,6 @@
             </BuildableReference>
          </TestableReference>
       </Testables>
-      <AdditionalOptions>
-      </AdditionalOptions>
    </TestAction>
    <LaunchAction
       buildConfiguration = "Debug"
@@ -62,8 +60,6 @@
             ReferencedContainer = "container:GCDWebServer.xcodeproj">
          </BuildableReference>
       </MacroExpansion>
-      <AdditionalOptions>
-      </AdditionalOptions>
    </LaunchAction>
    <ProfileAction
       buildConfiguration = "Release"
diff --git "a/GCDWebServer.xcodeproj/xcshareddata/xcschemes/GCDWebServers \050iOS\051.xcscheme" "b/GCDWebServer.xcodeproj/xcshareddata/xcschemes/GCDWebServers \050iOS\051.xcscheme"
index 3c0c35b..522d5f4 100644
--- "a/GCDWebServer.xcodeproj/xcshareddata/xcschemes/GCDWebServers \050iOS\051.xcscheme"
+++ "b/GCDWebServer.xcodeproj/xcshareddata/xcschemes/GCDWebServers \050iOS\051.xcscheme"
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1030"
+   LastUpgradeVersion = "1130"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"
@@ -27,8 +27,6 @@
       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
       shouldUseLaunchSchemeArgsEnv = "YES">
-      <Testables>
-      </Testables>
       <MacroExpansion>
          <BuildableReference
             BuildableIdentifier = "primary"
@@ -38,8 +36,8 @@
             ReferencedContainer = "container:GCDWebServer.xcodeproj">
          </BuildableReference>
       </MacroExpansion>
-      <AdditionalOptions>
-      </AdditionalOptions>
+      <Testables>
+      </Testables>
    </TestAction>
    <LaunchAction
       buildConfiguration = "Debug"
@@ -60,8 +58,6 @@
             ReferencedContainer = "container:GCDWebServer.xcodeproj">
          </BuildableReference>
       </MacroExpansion>
-      <AdditionalOptions>
-      </AdditionalOptions>
    </LaunchAction>
    <ProfileAction
       buildConfiguration = "Release"
diff --git "a/GCDWebServer.xcodeproj/xcshareddata/xcschemes/GCDWebServers \050tvOS\051.xcscheme" "b/GCDWebServer.xcodeproj/xcshareddata/xcschemes/GCDWebServers \050tvOS\051.xcscheme"
index a79d50c..7725b34 100644
--- "a/GCDWebServer.xcodeproj/xcshareddata/xcschemes/GCDWebServers \050tvOS\051.xcscheme"
+++ "b/GCDWebServer.xcodeproj/xcshareddata/xcschemes/GCDWebServers \050tvOS\051.xcscheme"
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1030"
+   LastUpgradeVersion = "1130"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"
@@ -27,8 +27,6 @@
       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
       shouldUseLaunchSchemeArgsEnv = "YES">
-      <Testables>
-      </Testables>
       <MacroExpansion>
          <BuildableReference
             BuildableIdentifier = "primary"
@@ -38,8 +36,8 @@
             ReferencedContainer = "container:GCDWebServer.xcodeproj">
          </BuildableReference>
       </MacroExpansion>
-      <AdditionalOptions>
-      </AdditionalOptions>
+      <Testables>
+      </Testables>
    </TestAction>
    <LaunchAction
       buildConfiguration = "Debug"
@@ -60,8 +58,6 @@
             ReferencedContainer = "container:GCDWebServer.xcodeproj">
          </BuildableReference>
       </MacroExpansion>
-      <AdditionalOptions>
-      </AdditionalOptions>
    </LaunchAction>
    <ProfileAction
       buildConfiguration = "Release"