Repository.update does not use jsonCodec to serialize JSON column

[mathwizard]

DefaultJdbcRepositoryOperations serialized JSON column in updateOne method using toString instead of using jsonCodec, this leads to error during SQL execution.

Steps to Reproduce

1. Create @MappedEntity Order and give it attribute with another class type e.g. "Address shippingAddress" and annotated with @typedef(type = DataType.JSON)
2. Insert an entity
3. Update the entity and attempt to store it via Repository.update(entity) method
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Expected Behaviour

The 'Address' object is properly serialized to JSON and the DB table is updated

Actual Behaviour

The 'Address' object is serialized via toString() and the update SQL fails

[mathwizard]

PR #483