Bunch of new features, improvements and bug fixes

• feat: add ifDialect and unlessDialect methods bdf6f0b
• feat: add distinctOn method a909df3
• feat: add support for dropping all tables 0da7b3c
• feat(mssql): allow options object which is forwaded to mssql driver 8cb23be
• feat: allow serializing extras using toJSON and toObject 62e321b
• feat: add firstOrFail to the db querybuilder 86718b3
• improvement: add model.load is an expressive alias to model.preload 5e517b6
• refactor: pass debug flag down to preload queries 86a5b34
• test: add relationship delete test cases 0d83a8b
• feat: add "fetchOrCreateMany" and "updateOrCreateMany" to hasMany relationship 9b6b802
• feat: allow multiple unique keys for fetchOrCreateMany and updateOrCreateMany 2add5f4
• fix: set correct exit code for the commands 0047d5b
• chore: update dependencies 1ff032c
• chore(docker): remove 'restart: always' directive (#612) 11e5538
• chore: update dependencies 2baaa4f
• improvement: for model inheritance 22d1e86
• fix: typo for "up to date" (#623) df04e8b
• chore: update dependencies 77b1ea5
• chore: update dependencies a44672d
• Revert "feat: add updateOrCreateMany method to hasMany relation (#615)" (#618) e5776e2
• feat: add updateOrCreateMany method to hasMany relation (#615) 04a6f44

v9.0.3...v10.0.0