Update dependency Newtonsoft.Json to v12.0.3

Author: renovate-bot

src/React.Core/React.Core.csproj

@@ -49,7 +49,7 @@
     <PackageReference Include="JavaScriptEngineSwitcher.Core" Version="3.1.0" />
     <PackageReference Include="JSPool" Version="4.0.0" />
     <PackageReference Include="Microsoft.Sourcelink.Github" Version="1.0.0-beta2-19554-01" PrivateAssets="All" />
-    <PackageReference Include="Newtonsoft.Json" Version="12.0.2" />
+    <PackageReference Include="Newtonsoft.Json" Version="12.0.3" />
   </ItemGroup>
 
   <ItemGroup Condition=" '$(TargetFramework)' == 'net40' Or '$(TargetFramework)' == 'net45' ">

src/React.Sample.Owin/React.Sample.Owin.csproj

@@ -33,7 +33,7 @@
     <PackageReference Include="Microsoft.Owin.Hosting" Version="3.1.0" />
     <PackageReference Include="Microsoft.Owin.SelfHost" Version="3.1.0" />
     <PackageReference Include="Microsoft.Owin.StaticFiles" Version="3.1.0" />
-    <PackageReference Include="Newtonsoft.Json" Version="12.0.2" />
+    <PackageReference Include="Newtonsoft.Json" Version="12.0.3" />
     <PackageReference Include="Owin" Version="1.0" />
   </ItemGroup>