New Feature: Catch boolean assertions with equality comparisons

[bmish]

Disallow and potentially autofix assertions like:

assert.true(foo === 1);
assert.false(foo !== 1);

Solutions:

1. Create rule new called no-boolean-equality. But this would be highly redundant with the no-ok-equality rule.
2. Add new option checkBooleanAssertions to no-ok-equality (default false until next major version).

My preference is 2 to avoid creating a highly redundant new rule.

[platinumazure]

Similar to #170, I agree with doing option 2 for now, although long-term I do want to rename the rule.