Fix Airtable sync checkbox set to false

[triozer]

Description

This pull request fixes a bug where updating a boolean field in Airtable would not sync in Framer. This happens because the Airtable REST API do not return the field if the value is false.

Fixes

• https://www.framer.community/c/plugins/possible-bug-in-airtable-plugin
• https://www.framer.community/c/plugins/theres-a-bug-on-the-airtable-plugin

Testing

• Synchronizing a base with containing a checkbox field
  • Open https://airtable.com/appsSUBLDCC9PvjXt/shrhmouTrRQK4saLh/tblzuKOcc3gjwX7Gd/viws9tt34yvdmT8QE and copy base to your workspace (for Framer employees there is a shared account for Airbase, ping me on Slack)
  • Import the base
  • Toggle Featured for some items
  • Synchronize the collection
  • The update items should have been update in the collection