Condition for pending approvals

[IvanFon]

Is your feature request related to a problem? Please describe.
Applying labels when a PR is pending approvals.

Describe the solution you'd like
Condition based on number of required approvals.

{
  name: "requiredApprovals",
  "count": 1
}

OR

{
  name: "approved",
  "value": true
}

Describe alternatives you've considered
Still considering:

• does the Github API support checking required # of approvals
• is checking # of approvals a common use case, or is a boolean better? (I'm leaning towards the latter)

[TGTGamer]

Implemented in #24