When generating JSON requests, allow preserving names specified using JsonProperty

[t00]

Currently camelCase naming is applied to all JSON properties, regardless of the case used in JsonProperty("CustomCASEProperty").
The proposed fix allows serialized JSON to contain arbitrary case names in custom properties.

Examples contain expected camelCase names so there should be no compatibility issues although if someone used the library and depended on changing MyCustomProperty to myCustomProperty, they will have to update custom names.

Hopefully you can include this change as otherwise use cases like mine, requiring specific case in JSON messages, will need to rely on a hack similar to the one below:

 private static void ConfigureJsonSerializer() { var settingsProperty = typeof(CorePush.Utils.JsonHelper).GetTypeInfo() .GetFields(BindingFlags.Static | BindingFlags.NonPublic) .FirstOrDefault(x => "settings".Equals(x.Name, StringComparison.OrdinalIgnoreCase)); if (settingsProperty != null && settingsProperty.GetValue(null) is JsonSerializerSettings settings) { settings.ContractResolver = new CamelCasePropertyNamesContractResolver { NamingStrategy = new CamelCaseNamingStrategy(true, false) }; } } 

[andrei-m-code]

Thanks for this PR. I'm migrating to System.Text.Json soon so this won't be necessary. We'll leave the version 3.x.x to work as is and starting from 4.x.x we'll use System.Text.Json without JsonHelper.

[t00]

Thanks for clarifying plans to migrate to System.Text.Json which is great news considering Newtonsoft.Json is a heavy dependency.

Will you make sure that serializer settings will be configurable just for net-core-push-notifications instead of using global settings which could be different to push?