v13.4.0

• Fix keyed :each memory leak — rows were retained across clear cycles
• Faster keyed :each — create, swap, remove, and update
• Per-key item reactivity — updating one field no longer re-runs sibling bindings
• Fix keyed row insert order when new rows land among reused ones
• Fix :each expression split truncating rhs on includes/indexOf/typeof
• Smaller core — :else folded into :if, unified row scope, Computed extends Signal

Full Changelog: v13.3.6...v13.4.0