The dbapi() classmethod on dialect classes has been renamed to import_dbapi()

[danieldaeschle]

SADeprecationWarning: The dbapi() classmethod on dialect classes has been renamed to import_dbapi().  Implement an import_dbapi() classmethod directly on class <class 'sqlalchemy_rqlite.pyrqlite.SQLiteDialect_rqlite'> to remove this warning; the old .dbapi() classmethod may be maintained for backwards compatibility.