Bump Newtonsoft.Json from 11.0.2 to 13.0.1 in /src/FX.Core

Bumps [Newtonsoft.Json](https://github.com/JamesNK/Newtonsoft.Json) from 11.0.2 to 13.0.1.
- [Release notes](https://github.com/JamesNK/Newtonsoft.Json/releases)
- [Commits](JamesNK/Newtonsoft.Json@11.0.2...13.0.1)

---
updated-dependencies:
- dependency-name: Newtonsoft.Json
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

src/FX.Core/FX.Core.fsproj

@@ -1,19 +1,19 @@
-<Project Sdk="Microsoft.NET.Sdk">
-
-  <PropertyGroup>
-    <TargetFramework>netstandard2.0</TargetFramework>
-  </PropertyGroup>
-
-  <ItemGroup>
-    <Compile Include="BasicTypes.fs" />
-    <Compile Include="OrderBook.fs" />
-    <Compile Include="RedisStorageLayer.fs" />
-    <Compile Include="MemoryStorageLayer.fs" />
-    <Compile Include="Exchange.fs" />
-  </ItemGroup>
-  <ItemGroup>
-    <PackageReference Include="FSharp.Core" Version="4.5.2" />
-    <PackageReference Include="StackExchange.Redis" Version="2.0.513" />
-    <PackageReference Include="Newtonsoft.Json" Version="11.0.2" />
-  </ItemGroup>
-</Project>
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>netstandard2.0</TargetFramework>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <Compile Include="BasicTypes.fs" />
+    <Compile Include="OrderBook.fs" />
+    <Compile Include="RedisStorageLayer.fs" />
+    <Compile Include="MemoryStorageLayer.fs" />
+    <Compile Include="Exchange.fs" />
+  </ItemGroup>
+  <ItemGroup>
+    <PackageReference Include="FSharp.Core" Version="4.5.2" />
+    <PackageReference Include="StackExchange.Redis" Version="2.0.513" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
+  </ItemGroup>
+</Project>