function isProxyEnabled() {
  return (
    config.useProxy &&
    typeof Proxy !== 'undefined' &&
    typeof Reflect !== 'undefined'
  );
}
### .isProxyEnabled()

Helper function to check if Chai's proxy protection feature is enabled. If
proxies are unsupported or disabled via the user's Chai config, then return
false. Otherwise, return true.

@namespace Utils
@name isProxyEnabled
@returns {boolean}