Merge pull request #6297 from Microsoft/merges/master-to-dev16.1

Merge master to dev16.1

Author: dotnet-automerge-bot

FSharpBuild.Directory.Build.props

@@ -21,6 +21,7 @@
     <ProtoOutputPath Condition="'$(OS)' != 'Unix'">$(ArtifactsBinDir)\fsc\Proto\net472</ProtoOutputPath>
     <ProtoOutputPath Condition="'$(OS)' == 'Unix'">$(ArtifactsBinDir)/fsc/Proto/netcoreapp2.1</ProtoOutputPath>
     <ValueTupleImplicitPackageVersion>4.4.0</ValueTupleImplicitPackageVersion>
+    <WarningsAsErrors>1182;0025;$(WarningsAsErrors)</WarningsAsErrors>
   </PropertyGroup>
 
   <!-- nuget -->