createDb method
Creates db if not exist
Implementation
@override
void createDb(Database db, int version) async {
await db.execute(
'Create table sqfentitytables (id integer primary key, tablename text, version int, properties text)');
await db.execute(
'Create table sqfentitysequences (id text UNIQUE, value integer)');
print(
'Your database ${connection!.databaseName} v:$version created successfully');
}