message: add notice header
diff: +/*
  + * 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 { kubernetesAuthProvidersApiRef } from './types';
  export { KubernetesAuthProviders } from './KubernetesAuthProviders';
  