Breaking

• Require ESLint 7 (#577) e4f44f3

New rules

• Add prefer-optional-catch-binding rule (#671) efdb03a
• Add no-useless-undefined rule (#718) 30dbe6d
• Add no-reduce rule (#704) 06ed7ee

Improvements

• throw-new-error: Check MemberExpression customError (#716) a28aad5
• prefer-starts-ends-with: Add auto-fix (#711) da978e3
• consistent-function-scoping: Ignore IIFE (#707) 1f4413d
• prefer-set-has: Ignore arrays only checking existence once (#706) 54c6f54

Fixes

• prefer-starts-ends-with: Fix bug with m flag (#721) 83bbabc
• prefer-string-slice: Handle negative length in .substr() (#709) 7439465

v19.0.1...v20.0.0