message: indexer-agent: Filter out subgraphs without a current version
  Use URL constructor to build url string for network subgraphs client
  config.
diff: @@ -88,7 +88,7 @@ export class Network {
  this.logger = logger.child({ component: 'Network' })
  this.subgraph = new ApolloClient({
  link: new HttpLink({
  - uri: indexerGraphqlUrl + 'subgraphs/name/graphprotocol/network-kovan',
  + uri: new URL('/subgraphs/name/graphprotocol/network', indexerGraphqlUrl).toString,
  fetch,
  }),
  cache: new InMemoryCache(),
  @@ -138,7 +138,7 @@ export class Network {
  let result = await this.subgraph.query({
  query: gql`
  query {
  - subgraphs {
  + subgraphs(where: { currentVersion_not: null }) {
  id
  totalNameSignaledGRT
  totalNameSignalMinted
  