v0.40.0

Breaking

• XO now enforces that your project is ESM
  If you cannot yet move to ESM, I recommend staying on XO 0.39 for now.
• Require Node.js 12.20 cc06c3c

New rules

• unicorn/prefer-node-protocol
• unicorn/prefer-module
• unicorn/no-document-cookie
• unicorn/numeric-separators-style
• unicorn/prefer-array-flat
• unicorn/prefer-array-flat-map

Meta

• Move from deprecated ESLint.CLIEngine to ESLint (#534) 0480d80
  This should hopefully resolve a bunch of issues.

v0.39.1...v0.40.0