Update `hexToNumber` to check for `< Number.MIN_SAFE_INTEGER`

[Spacesai1or]

hexToNumber actually checks if:

if (num > Number.MAX_SAFE_INTEGER) {
		return negative ? -num : num;
	}

so if we update it to also check for Number.MIN_SAFE_INTEGER, than my concern should be covered

Originally posted by @spacesailor24 in #4859 (comment)