v4.1.8

Fixes

• Fix an Object.keys IE 8 bug where localStorage.prototype.constructor === localStorage would throw (#275)
• Shimmed Object.defineProperty should not throw for an empty descriptor (#315)
• Fix Date#toISOString in Safari 5.1 (#243)
• Use Object#propertyIsEnumerable to default the initial "enumerable" value in Object.getOwnPropertyDescriptor sham (#289)
• Fix Array#splice with large sparse arrays in Safari 7/8, and Opera 12.15 (#295)

Robustness

• Safely use and reference many builtins internally (also see #313)

Tests

• Add Date#{getUTCDate,getUTCMonth} tests to expose Opera 10.6/11.61/12 Date bugs

Dev Deps

• Update eslint