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**Features and Improvements**
* Add a helper method ``add_resource_and_lambda_methods``, to set up a new
API resource, a lambda integration, and setup HTTP method(s) on the
new resource at the same time.
* Update other helper methods -- such as ``add_lambda_methods`` -- to accept
an optional ``resource`` parameter, which defaults to the "root" API
resource (``/``) by default.
* Add ``test`` parameter (boolean) to ``SecureRestApi`` -- if enabled,
then a live API call to AWS SSM (Parameter Store)
won't be performed on an initial run, and instead a dummy API key value
is used.