Create an array of unique values, in order, from the input arrays
$ npm install array-union
import arrayUnion from 'array-union';
arrayUnion([1, 1, 2, 3], [2, 3]);
//=> [1, 2, 3]
arrayUnion(['foo', 'foo', 'bar']);
//=> ['foo', 'bar']
arrayUnion(['π±', 'π¦', 'π»'], ['π¦', 'π']);
//=> ['π±', 'π¦', 'π»', 'π']
arrayUnion(['π±', 'π¦'], ['π»', 'π¦'], ['πΆ', 'π', 'π']);
//=> ['π±', 'π¦', 'π»', 'πΆ', 'π']