v0.1.7

• Refactor: { type: 'op', name: 'as' } renamed to { type: 'alias' }
• New: { type: 'mod' } for modifier, currently only DISTINCT is recognized
• New: unary operators like ! and NOT
• New: IS and IS NOT
• Fix: logic operator precendences
• Fix: polymorphic hasMany({ through }) relations
• Fix: dispatching multiple results with joins correctly