Merge pull request #699 from reactjs/renovate/system.threading.thread-4.x

Update dependency System.Threading.Thread to v4.3.0

Author: Daniel15

src/React.Core/React.Core.csproj

@@ -45,7 +45,7 @@
 
   <ItemGroup Condition=" '$(TargetFramework)' == 'netstandard1.6' ">
     <PackageReference Include="Microsoft.Extensions.DependencyModel" Version="1.1.9" />
-    <PackageReference Include="System.Threading.Thread" Version="4.0.0" />
+    <PackageReference Include="System.Threading.Thread" Version="4.3.0" />
   </ItemGroup>
 
   <ItemGroup Condition=" '$(TargetFramework)' == 'netstandard2.0' ">