logicalType in schema

[RyanQuey]

Hi there,

I'm getting this error The RecordTypeField can only contains {'order', 'aliases', 'type', 'doc', 'name', 'default'} keys, even though it looks like it's supported according to this.

They seem to have some other fields listed on the docs there, but I haven't tried that myself. This issue could resolve this as well, that would be nice to have some checking and just be able to support the new fields.

Thanks for this project!