FghjNode.remove

import fghj;
auto text = `{"foo":"bar","inner":{"a":true,"b":false,"c":"32323","d":null,"e":{}}}`;
auto rem = `{"do":null,"foo":null,"inner":{"c":null,"e":null}}`;
auto root = FghjNode(text.parseJson);
root.remove(rem.parseJson);
auto result = `{"inner":{"a":true,"b":false,"d":null}}`;
assert(root == FghjNode(result.parseJson));