language_picker 0.3.0+1

Language picker dropdown and dialog.

0.3.0+1

• Documented usage example.

0.3.0

• Rename the library to to language_picker.
• Fixed LanguagePickerDropdown's layout to render well with Flex, eg when two of them are laid out in a Row.
• Changed LanguagePickerDropdown's List<Map<String, String>> languagesList to List<Language> languages.
• Introduced Map<String, Language> defaultLanguageMap and List<Language> defaultLanguages.
• Removed duplicate English language from the default list.
• Removed dates from Greek and Occitan, eg "Greek, Modern (1453-)" to "Greek".
• Migrated to null safety. Thank you spsarolkar!

See the original package's prior changes at https://pub.dev/packages/language_pickers/changelog.