• added correct symbols descriptors
  • fixed behavior Object.{assign, create, defineProperty, defineProperties, getOwnPropertyDescriptor, getOwnPropertyDescriptors} with symbols
  • added single entry points for Object.{create, defineProperty, defineProperties}
• added Map#toJSON
• removed non-standard methods Object#[_] and Function#only - they solves syntax problems, but now in compilers available arrows, in near future will be available bind syntax
• removed non-standard undocumented methods Symbol.{pure, set}
• some fixes and internal changes