DateTime JSON compatible serialization doesn't put the date string in double quotes

[mjeras]

It seems that JsonEventEmitter doesn't set the eventInfo.Style correctly for DateTime, resulting in the date/time string ending up in single quotes what is not JSON compatible. For example:

using System;

using YamlDotNet.Serialization;

namespace YamlDotNetDateTimeBugReport
{
    class TestData
    {
        public DateTime Date => DateTime.Now;
    }

    class Program
    {
        static void Main(string[] args)
        {
            ISerializer jsonSerializer = new SerializerBuilder()
                .JsonCompatible()
                .Build();
            Console.WriteLine(jsonSerializer.Serialize(new TestData()));
        }
    }
}

results in

{"Date": '2021-02-24T10:20:12.3763590+01:00'}

The fix is simple, just adding
eventInfo.Style = ScalarStyle.DoubleQuoted;
under case TypeCode.DateTime in JsonEventEmitter.cs

[EdwardCooke]

This will be included in the next release.