message: indexer-service: Use array.includes() where possible
diff: @@ -47,9 +47,9 @@ export class IndexingSubgraphMonitor extends EventEmitter<IndexingSubgraphMonito
  .map((status: any) => status.subgraph)
  // Identify subgraphs changes
  - let removed = this.subgraphs.filter(subgraph => subgraphs.indexOf(subgraph) < 0)
  - let added = subgraphs.filter(subgraph => this.subgraphs.indexOf(subgraph) < 0)
  - let unchanged = this.subgraphs.filter(subgraph => subgraphs.indexOf(subgraph) > 0)
  + let removed = this.subgraphs.filter(subgraph => !subgraphs.includes(subgraph))
  + let added = subgraphs.filter(subgraph => !this.subgraphs.includes(subgraph))
  + let unchanged = this.subgraphs.filter(subgraph => subgraphs.includes(subgraph))
  // Update indexing subgraphs
  this.subgraphs = subgraphs
  