ParcelPure debounce, debug render, form tweaks

parcels

• Added Parcel({debugRender: true}) option to allow ParcelPure to paint re-rendered parcels different colours so you can see which ones are being re-rendered
• No breaking changes

parcels-react

• ParcelPure can paint re-rendered parcels different colours so you can see which ones are being re-rendered when given a parcel with debugRender: true
• Add debounce to ParcelPure

parcels-plugin-form

• Allow SubmitModifier to store last captured errors on meta.errors
• Added onError function to SubmitModifier config and to ParcelsPluginForm
• No breaking changes