Bug Description

1. Steps to reproduce and the simplest code sample possible to demonstrate the issue

Create a cloudant database view, and attempt to query the view using the python-cloudant library as follows:

results = database.get_view_result('_design/doc', 'view-name', raw_result=True, key=False)

The above code will raise a CloudantArgumentError due to the validation on this line

2. What you expected to happen

The expected outcome would be that the view get filtered by the boolean type key instead of raising the error

I removed the validation locally and reinitiated the view query, and the key filtered fine from the CouchDB library end i.e. their library accepted a boolean type for the key argument

3. What actually happened

A CloudantArgumentError was raised when trying to filter by a boolean value for the argument key

Environment details

Python 3.9.2
Database server: IBM Cloudant