Bump Gu.Roslyn.Extensions.Source from 0.16.6 to 0.17.0

Bumps [Gu.Roslyn.Extensions.Source](https://github.com/GuOrg/Gu.Roslyn.Extensions) from 0.16.6 to 0.17.0.
- [Release notes](https://github.com/GuOrg/Gu.Roslyn.Extensions/releases)
- [Changelog](https://github.com/GuOrg/Gu.Roslyn.Extensions/blob/master/RELEASE_NOTES.md)
- [Commits](https://github.com/GuOrg/Gu.Roslyn.Extensions/commits)

---
updated-dependencies:
- dependency-name: Gu.Roslyn.Extensions.Source
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

WpfAnalyzers/WpfAnalyzers.csproj

@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <TargetFramework>netstandard2.0</TargetFramework>
@@ -86,7 +86,7 @@
 
   <ItemGroup>
     <PackageReference Include="Gu.Analyzers" Version="2.0.2" PrivateAssets="all" />
-    <PackageReference Include="Gu.Roslyn.Extensions.Source" Version="0.16.6" PrivateAssets="all" />
+    <PackageReference Include="Gu.Roslyn.Extensions.Source" Version="0.17.0" PrivateAssets="all" />
     <PackageReference Include="IDisposableAnalyzers" Version="4.0.2" PrivateAssets="all" />
     <PackageReference Include="Microsoft.CodeAnalysis.CSharp.Workspaces" Version="4.5.0" PrivateAssets="all" />
     <PackageReference Include="Microsoft.VisualStudio.Threading.Analyzers" Version="17.5.22" PrivateAssets="all" />