• Fixed Object.getOwnPropertyNames(window) 2.1+ versions bug, #181

• Added String#matchAll, proposal
• Added Object#__(define|lookup)[GS]etter__, annex B ES2017
• Added @@toPrimitive methods to Date and Symbol
• Fixed %TypedArray%#slice in Edge ~ 13 (throws with @@species and wrapped / inherited constructor)
• Some other minor fixes

• Improved support NodeJS domains in Promise#then, #180
• Added fallback for Date#toJSON bug in Qt Script, #173

• Added fallback for Symbol polyfill in Qt Script, #173
• Added one more fallback for IE11 Script Access Denied error with iframes, #165

• Added fallback for es6-promise package bug, #176

• Some minor Promise fixes:
  • Browsers rejectionhandled event better HTML spec complaint
  • Errors in unhandled rejection handlers should not cause any problems
  • Fixed typo in feature detection

• Some Promise improvements:
  • Feature detection:
    • Added detection unhandled rejection tracking support - now it's available everywhere, #140
    • Added detection @@species pattern support for completely correct subclassing
    • Removed usage Object.setPrototypeOf from feature detection and noisy console message about it in FF
  • Promise.all fixed for some very specific cases

• API:
  • ES5 polyfills are split and logic, used in other polyfills, moved to internal modules
    • All entry point works in ES3 environment like IE8- without core-js/(library/)es5
    • Added all missed single entry points for ES5 polyfills
    • Separated ES5 polyfills moved to the ES6 namespace. Why?
      • Mainly, for prevent duplication features in different namespaces - logic of most required ES5 polyfills changed in ES6+:
        • Already added changes for: Object statics - should accept primitives, new whitespaces lists in String#trim, parse(Int|float), RegExp#toString logic, String#split, etc
        • Should be changed in the future: @@species and ToLength logic in Array methods, Date parsing, Function#bind, etc
        • Should not be changed only several features like Array.isArray and Date.now
      • Some ES5 polyfills required for modern engines
    • All old entry points should work fine, but in the next major release API can be changed
  • Object.getOwnPropertyDescriptors moved to the stage 3, January TC39 meeting
  • Added umd option for custom build process, #169
  • Returned entry points for Array statics, removed in 2.0, for compatibility with babel 6 and for future fixes
• Deprecated:
  • Reflect.enumerate deprecated and will be removed from the next major release, January TC39 meeting
• New Features:
  • Added Reflect metadata API as a pre-strawman feature, #152:
    • Reflect.defineMetadata
    • Reflect.deleteMetadata
    • Reflect.getMetadata
    • Reflect.getMetadataKeys
    • Reflect.getOwnMetadata
    • Reflect.getOwnMetadataKeys
    • Reflect.hasMetadata
    • Reflect.hasOwnMetadata
    • Reflect.metadata
  • Implementation / fixes Date#toJSON
  • Fixes for parseInt and Number.parseInt
  • Fixes for parseFloat and Number.parseFloat
  • Fixes for RegExp#toString
  • Fixes for Array#sort
  • Fixes for Number#toFixed
  • Fixes for Number#toPrecision
  • Additional fixes for String#split (RegExp#@@split)
• Improvements:
  • Correct subclassing wrapped collections, Number and RegExp constructors with native class syntax
  • Correct support SharedArrayBuffer and buffers from other realms in typed arrays wrappers
  • Additional validations for Object.{defineProperty, getOwnPropertyDescriptor} and Reflect.defineProperty
• Bug Fixes:
  • Fixed some cases Array#lastIndexOf with negative second argument

And, as I wrote, I stop active core-js development before finding related work. I already have no money for repairing my PC :) If you wanna progress in core-js - feel free contribute to the project or propose me a good work.

• Added fallback for V8 ~ Chrome 49 Promise subclassing bug causes unhandled rejection on feature detection, #159
• Added fix for very specific environments with global window === null

• Temporarily removed length validation from Uint8Array constructor wrapper. Reason - bug in ws module (-> socket.io) which passes to Buffer constructor -> Uint8Array float and uses the V8 bug for conversion to int (by the spec should be thrown an error). It creates problems for many people. I hope, it will be returned after fixing this bug in V8.