Merge pull request #38 from AlexBumb/master

updated Newtonsoft.Json to 13+, because version 12 has a vulnerabilit…

Author: dmitry-bym

src/JsonKnownTypes/JsonKnownTypes.csproj

@@ -6,7 +6,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Newtonsoft.Json" Version="[12.*,]" />
+    <PackageReference Include="Newtonsoft.Json" Version="[13.*,]" />
   </ItemGroup>
 
   <ItemGroup>