Duniter-squid version 0.2.8

For instance I still get different schemas as I mentioned here.

$ npx get-graphql-schema https://gdev-indexer.p2p.legal/v1/graphql > /tmp/sc1
$ npx get-graphql-schema https://squid.gdev.coinduf.eu/v1/graphql > /tmp/sc2
$ view -d /tmp/sc1 /tmp/sc2

cc @poka