V2.0.15

[Daniel-Ioannou]

In this version:

• Implemented Country Service
• Add support for German localization
• Add favorite option.
  • Can be used to to show the favorite countries at the top of the list.
  • It takes a list of country code(iso2).

    showCountryPicker(
      context: context,
      favorite: <String>['SE', 'MC'],
      onSelect: (Country country) {
        print('Select country: ${country.displayName}');
      },
    );

• Fix package assets