fix IL trimming warnings

[Stepami]

Using JsonSerializer.Serialize{TValue}(TValue, JsonTypeInfo{TValue}) overload to avoid IL warnings

Info:

• Validly 1.1.5

Still have trouble publishing AOT:

    ILC : Trim analysis warning IL2026: Validly.ValidationMessage.<>c.<.ctor>b__0_0(Object): Using member 'System.Text.Json.JsonSerializer.Serialize<Object>(Object,JsonSerializerOptions)' which has 'RequiresUnreferencedCodeAttribute' can break functionality when trimming application code. JSON serialization and deserialization might require types that cannot be statically analyzed. Use the overload that takes a JsonTypeInfo or JsonSerializerContext, or make sure all of the required types are preserved.
    ILC : AOT analysis warning IL3050: Validly.ValidationMessage.<>c.<.ctor>b__0_0(Object): Using member 'System.Text.Json.JsonSerializer.Serialize<Object>(Object,JsonSerializerOptions)' which has 'RequiresDynamicCodeAttribute' can break functionality when AOT compiling. JSON serialization and deserialization might require types that cannot be statically analyzed and might need runtime code generation. Use System.Text.Json source generation for native AOT applications.

[Stepami]

@Hookyns what is package version update strategy now?

[Hookyns]

I'd like to run some tests related to this. For now, I published it as 1.1.6-rc.1