Determine if the JS environment has Symbol support. Supports spec, or shams.
Example
var hasSymbols =require('has-symbols');hasSymbols() ===true; // if the environment has native Symbol support. Not polyfillable, not forgeable.var hasSymbolsKinda =require('has-symbols/shams');hasSymbolsKinda() ===true; // if the environment has a Symbol sham that mostly follows the spec.