Add external automation events for card and board (#33)

• Add external automation events for card and board (#33)

Updated to node 20

• Updated to node 20

v1.3

• Added 'extractCardId' to retrieve card id from pull request titles
• Updated README to reference v1.2

Add extra fields to createCard (#25)

• Upgraded dependencies
• Add extra fields to createCard (#25)

Added action to assign/unassign users

• Updated README for 1.1
• Added action for assigning users to cards
• Added action for managing user assignments
• Made minor updates to README

First public release of actions

• Added first actions; blockCard, moveCard, createCard, addComment
• Added helpers and tests for actions
• Added integration workflow tests, additional docs in readme
• Updated dependencies and removed unused libs