add explicit export for public utils

plugins/cost-insights/src/index.ts

@@ -19,5 +19,4 @@ export * from './api';
 export * from './components';
 export { useCurrency } from './hooks';
 export * from './types';
-export { Duration } from './utils/duration';
-export * from './utils/tests';
+export * from './utils/public';

plugins/cost-insights/src/utils/public/index.ts

@@ -0,0 +1,20 @@
+/*
+ * Copyright 2020 Spotify AB
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+export * from '../tests';
+export { Duration } from '../duration';
+export { CurrencyType } from '../currency';
+export { IconType } from '../icon';