Update to Roslyn 4.9.2

Directory.Packages.props

@@ -15,8 +15,8 @@
     <PackageVersion Include="JunitXml.TestLogger" Version="3.1.12" />
     <PackageVersion Include="K4os.Compression.LZ4" Version="1.3.6" />
     <PackageVersion Include="McMaster.Extensions.Hosting.CommandLine" Version="4.1.0" />
-    <PackageVersion Include="Microsoft.CodeAnalysis.CSharp" Version="4.8.0" />
-    <PackageVersion Include="Microsoft.CodeAnalysis.VisualBasic" Version="4.8.0" />
+    <PackageVersion Include="Microsoft.CodeAnalysis.CSharp" Version="4.9.2" />
+    <PackageVersion Include="Microsoft.CodeAnalysis.VisualBasic" Version="4.9.2" />
     <PackageVersion Include="Microsoft.DiaSymReader.Converter.Xml" Version="1.1.0-beta2-22171-02" />
     <PackageVersion Include="Microsoft.DiaSymReader" Version="1.4.0" />
     <PackageVersion Include="Microsoft.DiaSymReader.Native" Version="17.0.0-beta1.21524.1" />