Update pyproject.toml

Bump version to 0.1.21, update dependencies, and add MCP server funct…

…ionality

feat: enhance draft publishing with additional metadata and update ve…

…rsion to 0.1.20

feat(api): add methods for managing post tags

- Incremented version to 0.1.19 in pyproject.toml.
- Added `add_tags_to_post` method to allow adding multiple tags to a post.
- Implemented `get_publication_post_tags` to retrieve all tags for the current publication.
- Created `add_tag_to_post` to check for existing tags before creating new ones and applying them to posts.

Bump version to 0.1.18 in pyproject.toml

🔖 Bump version to 0.1.17; enhance README with authentication methods …

…and YAML post management examples

🔧 Update dependencies and enhance cookie authentication support

🏰 upkeep

🏰 upkeep

🦍 set post section