source-airtable: re-add removed `auth_method` property #53

Job	Run time
py_connector (source-airtable, capture, v1, 1.0)	2m 14s
py_connector (source-asana, capture, v1, 1.0)	1m 59s
py_connector (source-facebook-marketing, capture, v4, 1.0)	2m 5s
py_connector (source-gladly, capture, v1, 1.0)	1m 34s
py_connector (source-google-ads, capture, v2, 1.0)	2m 14s
py_connector (source-google-sheets-native, capture, v1, 0.0)	1m 50s
py_connector (source-hubspot-native, capture, v1, 1.0)	1m 48s
py_connector (source-hubspot, capture, v5, 1.0)	2m 39s
	16m 23s

Provide feedback