code: function to2 (alpha3) {
      if (alpha3 && alpha3.length > 1) state = alpha3
      if (state.length !== 3) return state
      return ISOCodes.filter(function (row) {
        return row.alpha3 === state
      })[0].alpha2
    }
docs: Convert an ISO 3166-1 alpha-3 code to alpha-2
  
  @param  {String} alpha3 USA
  @return {String}