Don't run the success handler if there was an error during the upgrade handler
Don't run the success handler if there was an error during the upgrade handler

safetychanger/IDBWrapper,mizchi/idb-wrapper-promisify,jensarps/IDBWrapper,kilbot/IDBWrapper,jayfunk/IDBWrapper,rubenstolk/IDBWrapper,GerHobbelt/IDBWrapper,kilbot/IDBWrapper,jayfunk/IDBWrapper,safetychanger/IDBWrapper,mizchi/idb-wrapper-promisify,jensarps/IDBWrapper,rubenstolk/IDBWrapper