refs and cleanup

Author: SimonCropp

src/.editorconfig

@@ -300,6 +300,8 @@ resharper_braces_for_lock = required
 resharper_braces_for_fixed = required
 resharper_braces_for_for = required
 
+resharper_return_value_of_pure_method_is_not_used_highlighting = error
+
 # Xml files
 [*.{xml,config,nuspec,resx,vsixmanifest,csproj,targets,props,fsproj}]
 indent_size = 2

src/Directory.Packages.props

@@ -9,7 +9,7 @@
     <PackageVersion Include="NUnit" Version="4.2.2" />
     <PackageVersion Include="NUnit3TestAdapter" Version="4.6.0" />
     <PackageVersion Include="Polyfill" Version="6.10.0" />
-    <PackageVersion Include="ProjectDefaults" Version="1.0.135" />
+    <PackageVersion Include="ProjectDefaults" Version="1.0.136" />
     <PackageVersion Include="System.Collections.Immutable" Version="8.0.0" />
     <PackageVersion Include="System.Memory" Version="4.5.5" />
     <PackageVersion Include="System.Threading.Tasks.Extensions" Version="4.5.4" />