use same version of lib also in gui project (json), update testdata

VECTO3GUI2020/VECTO3GUI2020.csproj

@@ -80,8 +80,8 @@
     <Reference Include="Microsoft.Xaml.Behaviors, Version=1.1.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
       <HintPath>..\packages\Microsoft.Xaml.Behaviors.Wpf.1.1.31\lib\net45\Microsoft.Xaml.Behaviors.dll</HintPath>
     </Reference>
-    <Reference Include="Newtonsoft.Json, Version=12.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed, processorArchitecture=MSIL">
-      <HintPath>..\packages\Newtonsoft.Json.12.0.1\lib\net45\Newtonsoft.Json.dll</HintPath>
+    <Reference Include="Newtonsoft.Json, Version=8.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed, processorArchitecture=MSIL">
+      <HintPath>..\packages\Newtonsoft.Json.8.0.3\lib\net45\Newtonsoft.Json.dll</HintPath>
     </Reference>
     <Reference Include="Ninject, Version=3.3.4.0, Culture=neutral, PublicKeyToken=c7192dc5380945e7, processorArchitecture=MSIL">
       <HintPath>..\packages\Ninject.3.3.4\lib\net45\Ninject.dll</HintPath>

VECTO3GUI2020/packages.config

@@ -6,7 +6,7 @@
   <package id="Microsoft.Maps.MapControl.WPF" version="1.0.0.3" targetFramework="net48" />
   <package id="Microsoft.Toolkit.Mvvm" version="7.0.2" targetFramework="net48" />
   <package id="Microsoft.Xaml.Behaviors.Wpf" version="1.1.31" targetFramework="net48" />
-  <package id="Newtonsoft.Json" version="12.0.1" targetFramework="net48" />
+  <package id="Newtonsoft.Json" version="8.0.3" targetFramework="net48" />
   <package id="Ninject" version="3.3.4" targetFramework="net48" />
   <package id="Ninject.Extensions.ChildKernel" version="3.3.0" targetFramework="net48" />
   <package id="Ninject.Extensions.Factory" version="3.3.3" targetFramework="net48" />