Dev - Airtable Compatibility

[NirajChaudhary143]

All Submissions:

• Have you followed the Everest Forms Contributing guideline?
• Does your code follow the WordPress' coding standards?
• Have you checked to ensure there aren't other open Pull Requests for the same update/change?

Changes proposed in this Pull Request:

This, PR add AirTable integration feature.

How to test the changes in this Pull Request:

1. Go to Everest Forms >> Global Settings >> Integrations >> Airtable.
2. Get Access token and connect Api.
3. Go to Everest Forms >> Form Builder Settings >> Integration >> Airtable
4. Select Base and Schema and map fields.
5. Check Airtable whether data are sync or not.
   Note : It contains PR on Free and Pro.

Types of changes:

• Bug fix (non-breaking change which fixes an issue)
• Enhancement (modification of the currently available functionality)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Other information:

• Have you added an explanation of what your changes do and why you'd like us to include them?
• Have you successfully ran tests with your changes locally?
• Have you updated the documentation accordingly?

Changelog entry

Dev - Airtable Compatibility

[deepench]

LGTM 👍

[riteelama]

LGTM 👍

[joshianup1]

LGTM 👍