Improvements to logging and some new additions

Bug Fixes

• Fix SimplePaginator.toJSON static type

Improvements

• Do not register health checker, until one or more connections have health checks enabled
• Improvements to the query debugging. Now debugging can be control globally, at connection level or at query level.

Additions

• Added findBy and findByOrFail methods to model

Commits

• improvement: serialize datetime to iso string 7091bab
• feat: query.delete method, it is an alias for the existing .del method ea7166c
• improvement: protect preload method to be called from a deleted instance eaff60a
• feat: add findBy and findByOrFail methods 3d3a8f4
• improvement: streamline query logging by disabling knex logger and user event emitter 21f01d6
• improvement: register health checker only when one or more connections are using it 117ec61
• chore: update dependencies 7611427
• fix(types): fix type returned by SimplePaginator.toJSON (#535) e386e94

v8.0.2...v8.0.3