fix: update en-NZ locale to use proper ordinal formatting function (#1143)

Author: jpbow

src/locale/en-nz.js

@@ -9,7 +9,11 @@ const locale = {
   weekdaysShort: 'Sun_Mon_Tue_Wed_Thu_Fri_Sat'.split('_'),
   monthsShort: 'Jan_Feb_Mar_Apr_May_Jun_Jul_Aug_Sep_Oct_Nov_Dec'.split('_'),
   weekdaysMin: 'Su_Mo_Tu_We_Th_Fr_Sa'.split('_'),
-  ordinal: n => n,
+  ordinal: (n) => {
+    const s = ['th', 'st', 'nd', 'rd']
+    const v = n % 100
+    return `[${n}${s[(v - 20) % 10] || s[v] || s[0]}]`
+  },
   formats: {
     LT: 'h:mm A',
     LTS: 'h:mm:ss A',