Three-way JSON Merge


Experimental 3-way JSON merge library.

Usage:
``typescript
import { diff3 } from 'json-diff3';

const state1 = {
hello: 1,
world: 2,
};
const state2 = {
hello: 1,
world: 2,
a: 2,
};
const state3 = {
hello: 1,
world: 3,
};

diff3(state1, state2, state3)

// =>
// {
// hello: 1,
// world: 3,
// a: 2,
// }
``