v0.22.1

• Make RegExp#flags more spec-compliant (#310)

v0.22.0

• Add RegExp#flags
• Make new RegExp work with both a regex and a flags string
• Remove non-spec Object.{getPropertyNames,getPropertyDescriptor}

v0.21.1

• Promise/Promise.prototype methods, and String#{startsWith,endsWith} are now not enumerable
• Array#{keys, values, entries} should all be @@unscopeable in browsers that support that
• Ensure that tampering with Function#{call,apply} won’t break internal methods
• Add Math.clz32, RegExp tests
• Update es6-sham UMD
• Update chai, es5-shim, grunt-saucelabs, jscs

v0.21.0

• String#contains → String#includes per 2014-11-19 TC39 meeting
• Use an invalid identifier as the es6-shim iterator key, so it doesn’t show up in the console as easily.

v0.20.4

• Performance improvements: avoid slicing arguments, avoid Function#call when possible
• Name String.{fromCodePoint,raw} for debugging
• Fix String.raw to match spec
• Ensure Chrome‘s excess Promise methods are purged
• Ensure Set#keys === Set#values, per spec

v0.20.3

• Fix Set#add and Map#set to always return "this" (#302)
• Clarify TypeError messages thrown by Map/Set
• Fix Chrome 38 bug with Array#values

v0.20.2

v0.20.2

v0.15.0

• Object.assign no longer throws on null or undefined sources, per https://bugs.ecmascript.org/show_bug.cgi?id=3096

v0.14.0

(from the changelog)

es6-shim 0.14.0 (20 Jul 2014)

• Properly recognize Symbol.iterator when it is present (#277)
• Fix Math.clz's improper handling of values that coerce to NaN (#269)
• Fix incorrect handling of negative end index on Array#fill (#270)
• Removed Object.getOwnPropertyKeys, which shouldn't be anywhere (#267)
• Fixed arity of Map and Set constructors, per 2014.04.27 draft spec (rev 24)
• Added a full additional suite of ES6 promise tests (thanks to @smikes!) (#265)
• Make Number.isInteger a bit more efficient (#266)
• Added npm run test-native to expose how broken implementations are without the shim ;-)
• Added additional tests

0.8.0

• Added Object.setPrototypeOf, Set#keys, Set#values, Map#keys, Map#values, Map#entries, Set#entries.
• Fixed String#repeat according to sp