lock roslyn version

Author: sailro

src/Directory.Packages.props

@@ -9,10 +9,10 @@
   <ItemGroup>
     <!-- Infrastructure -->
     <PackageVersion Include="Microsoft.VisualStudioEng.MicroBuild.Core" Version="1.0.0" />
-    <PackageVersion Include="Microsoft.CodeAnalysis.Analyzers" Version="4.14.0" />
-    <PackageVersion Include="Microsoft.CodeAnalysis.CSharp.Workspaces" Version="4.14.0" />
+    <PackageVersion Include="Microsoft.CodeAnalysis.Analyzers" Version="[4.14.0]" />
+    <PackageVersion Include="Microsoft.CodeAnalysis.CSharp.Workspaces" Version="[4.14.0]" />
     <!-- Local Analyzers -->
-    <PackageVersion Include="Microsoft.CodeAnalysis.CSharp.CodeStyle" Version="4.14.0" />
+    <PackageVersion Include="Microsoft.CodeAnalysis.CSharp.CodeStyle" Version="[4.14.0]" />
     <!-- VSIX -->
     <PackageVersion Include="Microsoft.VisualStudio.SDK" Version="17.14.40265" />
     <PackageVersion Include="Microsoft.VSSDK.BuildTools" Version="17.14.2120" />