feat(locales): add Norwegian Nynorsk locale (#439)

* Add Norwegian Nynorsk locale.

* Add 'nn-NO' to LocaleOptions type.

* Add 'nn-NO' to locale options.

* Correct previous year and month forms in 'nn-NO'

* Correct typo for Tuesday in nn-NO locale.

* Revert "Correct typo for Tuesday in nn-NO locale."

This reverts commit c4725de

* Correct form for 'today' in nn-NO locale.

* Correct typo for 'Tuesday' in nb-NO locale.

Author: JorgenVatle

src/locales/nb-NO.json

@@ -7,7 +7,7 @@
   "weekdays": [
     "Søndag",
     "Mandag",
-    "Tisdag",
+    "Tirsdag",
     "Onsdag",
     "Torsdag",
     "Fredag",

src/locales/nn-NO.json

@@ -0,0 +1,30 @@
+{
+  "todayButton": "I dag",
+  "nextMonth": "Neste månad",
+  "previousMonth": "Førre månad",
+  "nextYear": "Neste år",
+  "previousYear": "Førre år",
+  "weekdays": [
+    "Søndag",
+    "Måndag",
+    "Tysdag",
+    "Onsdag",
+    "Torsdag",
+    "Fredag",
+    "Laurdag"
+  ],
+  "months": [
+    "Januar",
+    "Februar",
+    "Mars",
+    "April",
+    "Mai",
+    "Juni",
+    "Juli",
+    "August",
+    "September",
+    "Oktober",
+    "November",
+    "Desember"
+  ]
+}

src/types/index.ts

@@ -28,6 +28,7 @@ export type LocaleOptions =
   | 'ja-JP'
   | 'ko-KR'
   | 'nb-NO'
+  | 'nn-NO'
   | 'pl-PL'
   | 'pt-BR'
   | 'ru-RU'

stories/data.ts

@@ -18,6 +18,7 @@ const locale = <const>[
   'ja-JP',
   'ko-KR',
   'nb-NO',
+  'nn-NO',
   'pl-PL',
   'pt-BR',
   'ru-RU',