v0.3.0

• Bump version from 0.2.0 to 0.3.0 (21a620c)
• Merge pull request #2 from Czarnak/feat/gantt-view (28a339b)
• Gantt view fix (1909814)
• feat: gantt views (9e4198c)
• feat: gantt core data module (8000392)
• feat: two-way TickTick sync of task start dates (spans) (c8dc1e0)
• feat: add optional start date to task model (f8ae3f4)
• docs: gantt view design spec (c5039ff)