Simple opsdroid skill to roll dice

Allows you to roll any number of n sided dice and add a modifier.

None

- name: roll-dice
  repo: https://github.com/AlmightyFuzz/skill-rolldice.git

Just type roll and then the number of dice followed by the dice type and any modifier.

The command takes the form: roll [n]d<n>[+n] Where [] indicates an optional field, <> a required input and n represents an integer.

eg: roll d4 roll 5d6 roll 2d8+2