New ability to create, read, and delete required field columns

Using the new validations endpoint, you can now query a board's required field columns. This query returns a JSON object containing metadata about a collection of required field columns.

query {
  validations(
    id: 1234567890
	) {
    required_column_ids
		rules
  }
}

You can also add and remove required field columns via the API using the following mutations:

• add_required_column
• remove_required_column