feat(common): enable StateTransferInitializerModule (#948)

Author: Fabian Wiles

modules/common/public-api.ts

@@ -6,4 +6,4 @@
  * found in the LICENSE file at https://angular.io/license
  */
 export { TransferHttpCacheModule } from './src/transfer_http';
-// export { StateTransferInitializerModule } from './src/state-transfer-initilizer/module';
+export { StateTransferInitializerModule } from './src/state-transfer-initilizer/module';