1.2.0 - 2015.09.27

• added browser Promise rejection hook, #106
• added correct IsRegExp logic to String#{includes, startsWith, endsWith} and RegExp constructor, @@match case, example
• updated String#leftPad with proposal: string filler truncated from the right side
• replaced V8 Object.assign - its properties order not only incorrect, it is non-deterministic and it causes some problems
• fixed behavior with deleted in getters properties for Object.{assign,entries, values}, example
• fixed Math.sinh with very small numbers in V8 near Chromium 38
• some other fixes and optimizations