Simplenote: äldre versioner att ladda ner

New Features
- Implemented support for importing ZIP files #3328
Fixes
- Fixed paste not working in context menu and enabled it in browsers #3316

- Updated the ID type used for analytics to avoid sending invalid WPCOM IDs #3291
- Updated styles, sass, style linting #3294
- Upgraded dependencies #3292
- Updated eslint configuration #3293

Enhancements
- Updated the remaining components to use CSS variables for colors #3025, #3024, #3023, #3022, #3021, #3020, #3019, #3018
- Updated the message that is shown when attempting to log in with a known compromised password #3013
- Removed unused hint option in the importer dialog #3027
- Updated the CSS to complete the move to using CSS variables for colors #3028
- Updated login error handling for the case of too many login attempts #3029