Error alert saying "boolean" is not a valid type for attribute "loading" (expects "string").

[ferreiravinicius]

Describe the bug
Showing error in console when using the component Button.
It says Received 'false' for a non-boolean attribute 'loading'
It shows even if we don't specify anything to the attribute (since it's false by default).

Expected behavior
No error log.
Attribute loading should be boolean following what is specified in the docs.

Screenshots

Cosmos version:
0.35.0

Additional context
Being replicated in Sandbox: https://codesandbox.io/s/modest-sunset-t5w8c
The component still working as expected. Just error alert popping in console after every render.