Throwing error when called with a context that is not the global context

[Jake Champion]

The following code should not throw according to the specification but does throw in this polyfill.

Symbol.bind(Array)()

It is likely this section that is not working as expected:

get-own-property-symbols/src/get-own-property-symbols.js

Lines 96 to 98 in fe7a6c8

 if (this && this !== G) { 
   throw new TypeError('Symbol is not a constructor'); 
 }