code: function findIndex (array, item) {
    return array
      .map(function (i) {
        return i.toLowerCase()
      })
      .indexOf(item.toLowerCase())
  }
docs: Find a string in an array. Case insensitive search
  @param {Array.<string>} array
  @param {string} item
  @return {number} Returns the index when found. Returns -1 when not found