v4.4.0

New Stuff

• Detect and patch RegExp#toString in IE 8, which returns flags in the wrong order (#364)

Fixes (shim)

• Patch Array#sort on {Chrome, Safari, IE < 9, FF 4} that throws improperly, per ES5 (#354)
• In IE 6, window.external makes Object.keys throw
• Array#slice: boxed string access on IE <= 8 (#349)
• Array#join: fix IE 6-8 join called on string literal (#352)
• Ensure that Error#message and Error#name are non-enumerable (#358)

Fixes (sham)

• Object.getOwnPropertyDescriptor: In Opera 11.6, propertyIsEnumerable is a nonshadowable global, like toString

Robustness

• Use a bound form of Array#slice.call

Tests

• Properly check for descriptor support in IE <= 8
• test on node v5.1
• Add Array#slice tests (#346)

Dev Deps

• update uglify-js, eslint, jscs, uglify-js, semver

Docs

• Fix broken UMD links (#344)