release-v0.4.0 (#254)

Release v0.4.0 (#251)
Version 0.4.0 (#251)
Release of version 0.3.0
See below the full CHANGELOG details.

### Added
- [DemoApp][Library] Create component - `Filter Chip` ([#213](#213))
- [DemoApp][Library] Create component - `Suggestion Chip` ([#212](#212))
- [DemoApp] Create component - Badge ([#88](https://github.com/Orange-OpenSource/ouds-flutter/issues/#88))
- [DemoApp][Library] Create component - `Switch` ([#49](#47))
- [DemoApp][Library] Tokens: `tag` ([#241](https://github.com/Orange-OpenSource/ouds-flutter/issues/#241))
- [DemoApp][Library] Tokens: `badge` ([#238](https://github.com/Orange-OpenSource/ouds-flutter/issues/#238))
- [DemoApp] Display components in both light/dark mode ([#223](#223))
- [DemoApp] Add token version in About page and documentation ([#142](https://github.com/Orange-OpenSource/ouds-flutter/issues/#142))

### Changed
- [DemoApp][Library] Update tokens 1.2.0 ([#236](#236))
- [DemoApp][Library] Update tokens 1.1.0 ([#225](#225))

### Fixed
- [Tool] add assets to `notice.txt` ([#244](#244))
- [DemoApp][Library] Delayed pressed state ([#220](#220))
- [DemoApp] Update cards backgrounds token ([#204](#204))
- [DemoApp][Library] Token `size` values now adapt based on device type ([#218](#218))
- [DemoApp] Color order mismatch in `Divider` component ([#216](#216))

Author: Tayebsed93