Unarmed strike does not automatically scale with strength

[stanavdb]

Is your feature request related to a problem? Please describe.
By rules the unarmed strike dice scale based on the strength stat. This is currently not applied.

Describe the solution you'd like
Unarmed strike should automatically scale with the strength stat.

Describe alternatives you've considered
—

Version
0.1.0

Additional context
Reported by @doc_sun on Discord.

Checklist:

• I have searched the existing issues to ensure this feature has not already been requested.

[jean-bougeois-cruz]

I'm going to handle this!