Peewee 3.0 update breaking changes

[Mysterionnz]

class BaseSignalModel(pw.BaseModel): change to class BaseSignalModel(pw.ModelBase):

if cls._meta.db_table and cls._meta.db_table != 'model': change to if cls._meta.table_name and cls._meta.table_name != 'model':

[tymofij]

Filed https://github.com/klen/flask-pw/pull/62