feat(theme): added new styles for component Dropdown

[gerzon05]

Style for component Dropdown

Introduction

In this PR add new styles for component Dropdown, It is about styles:

Api reference

const animation = {
  'dropdown-in': {
      '0%': {
        transform: 'scale(0.9)',
        opacity: '0',
      },
      '100%': {
        transform: 'scale(1)',
        opacity: '1',
      },
    },
    'dropdown-out': {
      '0%': {
        transform: 'scale(1)',
        opacity: '1',
      },
      '100%': {
        transform: 'scale(.9)',
        opacity: '0',
      },
    }, 
}

Related problems

Resolves #257

Preview

mode light

mode dark

[castrogarciajs]

LGTM!!