Adds requireGroup rule

[CodyMcMichael]

requireGroup – Ensures a given number of fields in a group are complete.

example validation config:

contactRequest: {
  mobile: { phoneUS: true, requireGroup: "phoneNumber" },
  home: { phoneUS: true, requireGroup: "phoneNumber" },
  work: { phoneUS: true, requireGroup: "phoneNumber" },
}

• Returns boolean

Expected outcome
In the options passed to the rule, supply a selector to define the
group. Then apply this rule to all the fields within the group.
Validation is not valid until at least 1 property has
been completed.

(e.g. a user must fill out either the mobile phone field, or the home phone field.)

Enhancement
Extend the rule to take in a min-required number to also validate against.
we do not currently have a set delineation standard. Could be space separated string or array of values

• In the example above requireGroup: "2 phoneNumber" || requireGroup: [2, "phoneNumber"]

The validation is not valid until at least the minimum number have
been completed.