Downgrade Newtonsoft.Json to 9.0.1

ICSharpCode.Decompiler/ICSharpCode.Decompiler.csproj

@@ -50,7 +50,7 @@
 
   <ItemGroup>
     <PackageReference Include="Humanizer.Core" Version="2.2.0" />
-    <PackageReference Include="Newtonsoft.Json" Version="10.0.3" />
+    <PackageReference Include="Newtonsoft.Json" Version="9.0.1" />
     <PackageReference Include="System.Collections.Immutable" Version="1.3.1" />
     <PackageReference Include="System.ValueTuple" Version="4.3.0" />
   </ItemGroup>

ICSharpCode.Decompiler/ICSharpCode.Decompiler.nuspec.template

@@ -16,7 +16,7 @@
     <tags>C# Decompiler ILSpy</tags>
     <dependencies>
       <dependency id="Humanizer.Core" version="2.2.0" />
-      <dependency id="Newtonsoft.Json" version="10.0.3" />
+      <dependency id="Newtonsoft.Json" version="9.0.1" />
       <dependency id="System.Collections.Immutable" version="1.3.1" />
       <dependency id="System.ValueTuple" version="4.3.0" />
     </dependencies>