Warning about JSON.NET obsolete in v1.5

[Horusiath]

This PR includes information about obsoleting JSON.NET as the default serializer in Akka.NET version 1.5. (see #1695). Warning contains link to manual informing, how to change default serializer to Wire and info about how to suppress this warning message by setting suppress-json-serializer-warning config key to on.

[alexvaluyskiy]

Are you sure that Wire is ready for production use?

For example I have this class and I try to serialize and deserialize it

public class TestSerialization
    {
        public TestSerialization(byte[] document, IReadOnlyList<byte> list, ImmutableArray<byte> immutable)
        {
            Document = document;
            DocumentReadOnly = list;
            DocumentImmutable = immutable;
        }

        public byte[] Document { get; set; }

        public ImmutableArray<byte> DocumentImmutable { get; set; }

        public IReadOnlyList<byte> DocumentReadOnly { get; set;}
    }
    var byte = new byte[] { 2, 6, 8, 9, 3 };
    var list = new ReadOnlyCollection<byte>(byte);
    var immutable = ImmutableArray.Create(byte );
    var expected = new TestSerialization(byte, list, immutable);

I get this result

Document = [5, 0, 0, 0, 3, 0, 0, 0]
DocumentReadOnly = [2, 0, 6, 0, 8]
DocumentImmutable = null

But if I add a string property to TestSerialization class and try again I will get an exception {"Object of type 'System.Byte' cannot be converted to type 'System.String'."}

public string Title { get; } = "Test string";

There is related bug asynkron/Wire#18

[rogeralsing]

The issue have been fixed in Wire.
Also a suggestion, if you have test code as the above, please submit that as a PR to Wire instead.