ToPrimitive called without hint for boolean equality

[cxielarko]

For non-strict equality, an object compared to a boolean should be coerced using ToPrimitive with no hint argument. (A "number" hint was used in an earlier version of the BigInt proposal, before this commit.)

[littledan]

Good catch identifying this gap. I think we'd benefit from more tests in this area, e.g., that no hint is provided for +, that the hint is "number" for -, etc.