Improvements to the sync method, along with some bug fixes

• improvement: improve sync method to not select all pivot rows 76ebf32
• fix: always set updatedAt when model is dirty d7e5672
• fix: Database.transaction accept callback to be passed to the query client 5e07ed8
• chore: update dependencies 072c794
• fix(types): correct type of Model.createMany values parameter (#533) 6727f8e

v8.0.0...v8.0.1