Shallow variant

[Svish]

Would it be possible to get a flag or variant of this which doesn't work recursively? Specifically, from the examples in the README, the following to be false, not true:

isSubset(
  {a: 1, bcd: [1, 2, 3]},
  {a: 1, bcd: [1, 2]}
);

I.e. false because the value (the array) of bcd is not equal.