message: [Doc] add gzip size badge
diff: @@ -223,7 +223,7 @@ export default create({
  },
  isLeapYear(year) {
  - return (year % 400 === 0) || (year % 100 !== 0 && year % 4 === 0);
  + return (year % 4 === 0 && year % 100 !== 0) || (year % 400 === 0);
  },
  isShortMonth(month) {
  