New rules

• Add prefer-negative-index rule (#417) 20dfb65
• Add prefer-trim-start-end rule (#440) 29e3b13

Improvements

• Extend fixers for prefer-string-slice rule (#424) 567c970
• Add ignoreImports option to import-index rule (#421) bda7769
• Make regex-shorthand rule use regexp-tree for regex literals (#437) 3554c17

Fixes

• Fix prevent-abbreviations rule fixer bug (#444) fa8c80e
• Fix custom-error-definition rule to support constructors without a body (#442) a496e96

v13.0.0...v14.0.0