Bump knex from 0.14.6 to 0.19.5

Bumps [knex](https://github.com/knex/knex) from 0.14.6 to 0.19.5.
- [Release notes](https://github.com/knex/knex/releases)
- [Changelog](https://github.com/knex/knex/blob/master/CHANGELOG.md)
- [Commits](knex/knex@0.14.6...0.19.5)

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]