Unknown types are uppercased without recourse

[bradchoate]

In our migrations using the db.createTable API, if we specify an unsupported type, it becomes uppercased (see here). This is not desirable; in some cases the type is a list of enum values (using the MySQL db-migrate driver). While it "works", it means that the values returned for the column are uppercased, but we'd prefer them to be in the case given (lowercase), since MySQL will return the enum value in whichever case it was when the table was defined.

If you want the unsupported type to be uppercased, please parse for quoted strings and preserve the content of each quoted string.