Version 2.0.0

Release summary:

Dropped support for Node.js 6, removed a bunch of deprecated and outdated methods, replaced remaining ES5-style classes with ES6 classes, and added changelog and utility methods for Iterator.

Changelog:

Added

• CHANGELOG.md file.
• Iterator#collectWith() now returns the provided object.
• Iterator#toObject() to collect iterable into an Object similar to
  Object.fromEntries().
• common.iterEntries(), common.iterKeys(), common.iterValues() utility
  methods.

Changed

• Expose AuthenticationStrength's compliance number property instead of
  strength string.
• Replaced ES5-style classes and inheritance with ES6 classes for Cache and
  EnhancedEmitter.
• Signature of merger() in mergeObjects() to also contain the merging key.

Removed

• Dropped support for Node.js 6.
• Outdated inherits() method (in favor of util.inherits() available in
  Node.js).
• Multiple deprecated functions:
  • common.ip2int() - replace with common.ipToInt()
  • common.cb() - replace with common.once()
  • common.extractCallback() - replace with common.unsafeCallback()
  • common.cbUnsafe() - replace with common.unsafeCallback()
  • common.cbExtract() - replace with common.safeCallback()
  • common.crcSID() - replace with common.crcToken()
  • common.generateSID() - replace with common.generateToken()
  • common.validateSID() - replace with common.validateToken()
• Functions that can be replaced with util.deprecate() available in Node.js:
  • common.deprecate()
  • common.alias()

Fixed

• Functions common.clone(), common.deleteByPath(), and
  common.mergeObjects() throwing when used on objects without prototype.