Changes to reflect the upgrade of duniter to polkadot 1.6.0

Ran into issues by locally running the indexer against the version of duniter after the polkadot 1.6.0 upgrade, where the schema for the blockchain spec file has changed.

Pending changes:

• Regenerate the gdev.json file to match the new version schema

See https://forum.duniter.org/t/running-full-local-network-for-tests-duniter-indexer/11995/13 for context

src/genesis.ts

@@ -11,7 +11,9 @@ export async function saveGenesis(ctx: Ctx, block: Block) {
   ctx.log.info("Loading genesis");
 
   // Read genesis json
-  const genesis: Genesis = JSON.parse(readFileSync(path.resolve(process.cwd(), genesis_path)).toString()).genesis.runtimeAndCode.runtime;
+  const genesisData = JSON.parse(readFileSync(path.resolve(process.cwd(), genesis_path)).toString()).genesis;
+  // Accomodate for versions of polkadot before and after 1.6.0:
+  const genesis: Genesis = genesisData.runtimeAndCode?.runtime || genesisData.runtimeGenesis.patch;
 
   const accounts: Map<Address, Account> = new Map();
   const identities: Map<IdtyIndex, Identity> = new Map();