Update knex and nest packages to latest versions

[Dea7h-cyber]

This solves the following:

1. If you update your knex to the latest version, you will get an error because @nestjsplus/knex is not using latest knex version
2. You can't run this on newer node version (v14+)

cc @johnbiundo

[miso-belica]

This will solve the issue https://github.com/knex/knex/issues/3831. This library is practically unusable now.