0.4.5 - layout + readability fixes

What's Changed

• fix: clear error for unannotated edges by @pinin4fjords in #76
• feat: add stroke support for animation balls by @pinin4fjords in #78
• fix: equidistant spacing for cross-line fork stations by @pinin4fjords in #80
• fix: symmetric diagonal slopes at convergence/divergence stations by @pinin4fjords in #81
• feat: bold station labels for readability by @pinin4fjords in #82
• chore: bump version to 0.4.5 by @pinin4fjords in #83

Full Changelog: 0.4.4...0.4.5