function isNegZero(node) {
			return (
				node.type === "UnaryExpression" &&
				node.operator === "-" &&
				node.argument.type === "Literal" &&
				node.argument.value === 0
			);
		}
Checks a given node is -0
@param {ASTNode} node A node to check.
@returns {boolean} `true` if the node is -0.