Package reference updates

Author: EWSoftware

Docs/ExtendedDocCommentsProviderDocs.shfbproj

@@ -1,7 +1,9 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project ToolsVersion="14.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <PropertyGroup>
-    <!-- The configuration and platform will be used to determine which assemblies to include from solution and
+		<!-- A target framework version is required by Visual Studio.  It can be any version with a targeting pack installed. -->
+		<TargetFrameworkVersion>v4.7.2</TargetFrameworkVersion>
+		<!-- The configuration and platform will be used to determine which assemblies to include from solution and
 				 project documentation sources -->
     <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
     <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>

Source/ExtendedDocCommentsProvider.csproj

@@ -74,23 +74,22 @@
   </ItemGroup>
   <ItemGroup>
     <PackageReference Include="Microsoft.CodeAnalysis.CSharp">
-      <Version>4.13.0</Version>
+      <Version>4.14.0</Version>
     </PackageReference>
     <PackageReference Include="Microsoft.CodeAnalysis.Features">
-      <Version>4.13.0</Version>
+      <Version>4.14.0</Version>
     </PackageReference>
     <PackageReference Include="Microsoft.CodeAnalysis.Workspaces.Common">
-      <Version>4.13.0</Version>
+      <Version>4.14.0</Version>
     </PackageReference>
-    <PackageReference Include="Microsoft.VisualStudio.SDK" Version="17.13.40008" ExcludeAssets="runtime">
+    <PackageReference Include="Microsoft.VisualStudio.SDK" Version="17.14.40265" ExcludeAssets="runtime">
       <IncludeAssets>compile; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="Microsoft.VSSDK.BuildTools" Version="17.13.2126">
+    <PackageReference Include="Microsoft.VSSDK.BuildTools" Version="17.14.2094">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>
     </PackageReference>
   </ItemGroup>
-  <ItemGroup />
   <ItemGroup>
     <Compile Include="CommentsElement.cs" />
     <Compile Include="CSharpXmlDocCommentsCompletionProvider.cs" />
@@ -111,6 +110,9 @@
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </Content>
   </ItemGroup>
+  <ItemGroup>
+    <Reference Include="System" />
+  </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
   <Import Project="$(VSToolsPath)\VSSDK\Microsoft.VsSDK.targets" Condition="'$(VSToolsPath)' != ''" />
   <PropertyGroup>