Add Aragonese, Bengali, and Western Frysian languages

Used `es` as the parent locale for Aragonese since it doesn't have locale data already defined.

package.json

@@ -1,6 +1,6 @@
 {
     "name": "scratch-l10n",
-    "version": "3.13.0",
+    "version": "3.14.0",
     "description": "Localization for the Scratch 3.0 components",
     "main": "./dist/l10n.js",
     "browser": "./src/index.js",

src/locale-data.js

@@ -6,6 +6,7 @@ import am from './locale-data/am';
 import ar from './locale-data/ar';
 import az from './locale-data/az';
 import be from './locale-data/be';
+import bn from './locale-data/bn';
 import bg from './locale-data/bg';
 import ca from './locale-data/ca';
 import ckb from './locale-data/ckb';
@@ -20,6 +21,7 @@ import eu from './locale-data/eu';
 import fa from './locale-data/fa';
 import fi from './locale-data/fi';
 import fr from './locale-data/fr';
+import fy from './locale-data/fy';
 import ga from './locale-data/ga';
 import gd from './locale-data/gd';
 import gl from './locale-data/gl';
@@ -75,6 +77,7 @@ let localeData = [].concat(
     az,
     be,
     bg,
+    bn,
     ca,
     ckb,
     cs,
@@ -88,6 +91,7 @@ let localeData = [].concat(
     fa,
     fi,
     fr,
+    fy,
     ga,
     gd,
     gl,

src/supported-locales.js

@@ -8,8 +8,10 @@ const locales = {
     'af': {name: 'Afrikaans'},
     'ar': {name: 'العربية'},
     'am': {name: 'አማርኛ'},
+    'an': {name: 'Aragonés'},
     'az': {name: 'Azeri'},
     'id': {name: 'Bahasa Indonesia'},
+    'bn': {name: 'বাংলা'},
     'be': {name: 'Беларуская'},
     'bg': {name: 'Български'},
     'ca': {name: 'Català'},
@@ -25,6 +27,7 @@ const locales = {
     'eu': {name: 'Euskara'},
     'fa': {name: 'فارسی'},
     'fr': {name: 'Français'},
+    'fy': {name: 'Frysk'},
     'ga': {name: 'Gaeilge'},
     'gd': {name: 'Gàidhlig'},
     'gl': {name: 'Galego'},
@@ -82,6 +85,11 @@ const customLocales = {
         locale: 'ab',
         parentLocale: 'ru'
     },
+    // Aragonese is not in the locale data, using es for Spain
+    'an': {
+        locale: 'an',
+        parentLocale: 'es'
+    },
     // haitian creole is not in locale-langData
     'ht': {
         locale: 'ht',