Updated Newtonsoft.Json and other packges (#1)

Author: mayur-agarwal-lrn

TinCan/TinCan.csproj

@@ -48,7 +48,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Newtonsoft.Json" Version="11.0.2" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
   </ItemGroup>
 
   <ItemGroup>

TinCanTests/TinCanTests.csproj

@@ -1,12 +1,12 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>netcoreapp2.1</TargetFramework>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
   </PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.8.0" />
-    <PackageReference Include="NUnit" Version="3.10.1" />
-    <PackageReference Include="Newtonsoft.Json" Version="11.0.2" />
-    <PackageReference Include="NUnit3TestAdapter" Version="3.10.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.2.0" />
+    <PackageReference Include="NUnit" Version="3.13.3" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
+    <PackageReference Include="NUnit3TestAdapter" Version="4.2.1" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\TinCan\TinCan.csproj" />