function find(arr, check) {
    // use native find if supported
    if (Array.prototype.find) {
      return arr.find(check);
    }

    // use `filter` to obtain the same behavior of `find`
    return arr.filter(check)[0];
  }
Mimics the `find` method of Array
@method
@memberof Popper.Utils
@argument {Array} arr
@argument prop
@argument value
@returns index or -1