New rule: no-ok-equality

[platinumazure]

We should create a rule which ensures that equality checks are not performed as the assertion argument of assert.ok and assert.notOk.

Ideally, the rule would suggest a better assertion to use instead:

• assert.ok(a === b) would become assert.strictEqual(a, b)
• assert.ok(a == b) would become assert.equal(a, b)
• assert.ok(a !== b) would become assert.notStrictEqual(a, b)
• assert.ok(a != b) would become assert.notEqual(a, b)
• assert.notOk(a === b) would become assert.notStrictEqual(a, b)
• assert.notOk(a == b) would become assert.notEqual(a, b)
• assert.notOk(a !== b) would become assert.strictEqual(a, b)
• assert.notOk(a != b) would become assert.equal(a, b)