fixed umd test issue

Author: fayyazarshad

packages/optimizely-sdk/lib/core/audience_evaluator/index.js

@@ -33,7 +33,7 @@ var MODULE_NAME = 'AUDIENCE_EVALUATOR';
  *                                                   Optimizely evaluators cannot be overridden.
  * @constructor
  */
-export function AudienceEvaluator(UNSTABLE_conditionEvaluators) {
+function AudienceEvaluator(UNSTABLE_conditionEvaluators) {
   this.typeToEvaluatorMap = fns.assign({}, UNSTABLE_conditionEvaluators, {
     custom_attribute: customAttributeConditionEvaluator,
   });

packages/optimizely-sdk/lib/core/audience_evaluator/index.tests.js

@@ -13,7 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-import AudienceEvaluator from './index';
+import AudienceEvaluator from './';
 import chai from 'chai';
 import conditionTreeEvaluator from '../condition_tree_evaluator';
 import customAttributeConditionEvaluator from '../custom_attribute_condition_evaluator';