v0.2.4

ELK layout has been much improved by increasing node dimensions to make room for nice even padding around ports:

Do you use ELK more than dagre? We're considering switching d2's default layout engine to ELK, so please chime in to this poll if you have an opinion! #990

Improvements 🧹

• ELK nodes with > 1 connection grow to ensure padding around ports #981
• Using a style keyword incorrectly in connections returns clear error message #989
• Unsemantic Markdown returns clear error message #994

Bugfixes ⛑️

• Accept absolute paths again on the CLI (regression from previous release). #979
• Fixes some rare undefined behavior using capitalized reserved keywords #978
• Fixes an error rendering when links contained & characters #988