fix: ordinal for nl not working (iamkun#2011)

Author: ctessier

src/locale/nl.js

@@ -8,7 +8,7 @@ const locale = {
   weekdaysMin: 'zo_ma_di_wo_do_vr_za'.split('_'),
   months: 'januari_februari_maart_april_mei_juni_juli_augustus_september_oktober_november_december'.split('_'),
   monthsShort: 'jan_feb_mrt_apr_mei_jun_jul_aug_sep_okt_nov_dec'.split('_'),
-  ordinal: n => `${n}${n === 1 || n === 8 || n >= 20 ? 'ste' : 'de'}`,
+  ordinal: n => `[${n}${n === 1 || n === 8 || n >= 20 ? 'ste' : 'de'}]`,
   weekStart: 1,
   yearStart: 4,
   formats: {

test/plugin/advancedFormat.test.js

@@ -8,6 +8,7 @@ import weekYear from '../../src/plugin/weekYear'
 import timezone from '../../src/plugin/timezone'
 import utc from '../../src/plugin/utc'
 import '../../src/locale/zh-cn'
+import '../../src/locale/nl'
 
 dayjs.extend(utc)
 dayjs.extend(timezone)
@@ -51,12 +52,16 @@ it('Format Day of Month Do 1 - 31', () => {
   expect(dayjs(d).format('Do')).toBe(moment(d).format('Do'))
   d = '2018-05-04 00:00:00.000'
   expect(dayjs(d).format('Do')).toBe(moment(d).format('Do'))
+  d = '2018-05-08 00:00:00.000'
+  expect(dayjs(d).locale('nl').format('Do')).toBe(moment(d).locale('nl').format('Do'))
   d = '2018-05-11'
   expect(dayjs(d).format('Do')).toBe(moment(d).format('Do'))
   d = '2018-05-12'
   expect(dayjs(d).format('Do')).toBe(moment(d).format('Do'))
   d = '2018-05-13'
   expect(dayjs(d).format('Do')).toBe(moment(d).format('Do'))
+  d = '2018-05-19 00:00:00.000'
+  expect(dayjs(d).locale('nl').format('Do')).toBe(moment(d).locale('nl').format('Do'))
   d = '2018-05-22'
   expect(dayjs(d).format('Do')).toBe(moment(d).format('Do'))
 })