Filippo De Santis

Just a small fix for a typo :)

(Postgresql) Migration applied if the update of the schemaversion table throws an error

1

Hi, I'm running postgrator with postgresql and I found a potential issue when the [insert](https://github.com/rickbergfalk/postgrator/blob/ef3cb8bedcdeaa94c429b711e7f926082a0fad66/lib/Client.js#L21) into the `schemaversion` table fails. 1. A migration is run and changes the db 2....