Deprecation warning for Rails 6.1

[cmunozgar]

When running the specs for the mailers that use inky, I get the following warning message:

DEPRECATION WARNING: The asset "emails.css" is not present in the asset pipeline.
Falling back to an asset that may be in the public folder.
This behavior is deprecated and will be removed.
To bypass the asset pipeline and preserve this behavior,
use the `skip_pipeline: true` option.

If I set the option skip_pipeline:true then premailer doesn't work.

I have the latest version of inky-rb installed.