v4.1.1

• Fix name of parseInt replacement.
• Update copyright year
• Update eslint, jscs
• Lock uglify-js down to v2.4.17, since v2.4.18 and v2.4.19 have a breaking change.
• All grade A-supported node/iojs versions now ship with an npm that understands ^.
• Run travis-ci tests on latest node and iojs; speed up builds; allow 0.8 failures.
• Ensure some Object tests don't fail in ES6
• Make sure Date instances don't have an enumerable constructor property, when possible.