v0.2.0

This release adds the remaining functionality from the Lighthouse API:

• Commands now support using names/titles to identify resources in addition to IDs. For example, lh get milestone "My Milestone" can now be used instead of lh get milestone 8854. When identifying users, lookup is case insensitive and users can be identified using only their first name.
• Add lh create, lh delete and lh update commands.
• Add lh get project command.
• Renamed lh list memberships command to lh get project --memberships.
• Support downloading ticket attachments with lh get ticket --attachment command.