Update defaults to be more up-to-date

[marknet15]

Overview

This role is really useful but some of the defaults are a little outdated so I've updated them to be more up-to-date such as the versions installed by default of homebridge and nodejs.

[hannseman]

Super, thanks! 👍

[marknet15]

@hannseman I'm just taking a look at the CI as it seems to have failed following the merge on the pretasks

CRITICAL Failed to pre-validate.
{'driver': [{'name': ['unallowed value docker']}], 'lint': ['must be of string type']}
The command "molecule --debug test" exited with 1.

[marknet15]

Think it's the same issue as reported here:
ansible/molecule#2891

Raised a followup PR:
#5