function isStringLiteral(node) {
	return (
		(node && node.type === Syntax.Literal && typeof node.value === "string")
		|| isTemplateLiteralWithoutExpression(node)
	);
}
Checks whether a node is Literal or TemplateLiteral without an expression

@param {Node} node AST node to check
@returns {boolean} Whether the given AST node represents a constant string