v0.0.9

• Reuse interpolators, where possible, in transition.attr and transition.style.
• Reuse dispatches, where possible, in transition.on.
• Reuse tweens, where possible, in transition.tween.
• Dispatch interrupt before clearing the interrupted transition, allowing chaining.
• Chained transitions now use the preceding end as reference time, allowing custom delay.
• Disallow modification of transition state after start.
• Disallow modification of transition delay and listeners after schedule.
• Disallow inspection of transition state after end.
• Update dependencies.