fix(switchDatabase): no error was thrown on scope switch
fix(switchDatabase): no error was thrown on scope switch

switchDatabase error was unhandled, which resulted in an unhandled
scope switch error.

Fixes #470

Signed-off-by: Tobias Gurtzick <b40981aab75932c5b2f555f50769d878e44913d7@wizardtales.com>

db-migrate/node-db-migrate,db-migrate/node-db-migrate