Yet another thread on boolean validations

I see there has been lots of chatter over the years on how to properly validate the presence of a boolean field.
The community has settled, rightly, on this
validates :field, inclusion: { in: [true, false] }

or

validates :field, exclusion: { in: [nil] }

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I’d like to suggest that we make this even better and add a boolean validator to allow for:

validates :field, boolean: true

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By using this method we would not only validate presence, but also the inclusion of a true or false value.

Would love to hear thoughts on this. PR incoming.