Fix availableNetworks() (#1129)

* fix availableNetworks()
ref #1087

* Create .changeset/breezy-impalas-peel.md

* style: prettier

---------

Co-authored-by: Saihajpreet Singh <[email protected]>

Author: YaroShkvorets

.changeset/breezy-impalas-peel.md

@@ -0,0 +1,5 @@
+---
+"@graphprotocol/graph-cli": patch
+---
+
+Fix availableNetworks() for substreams

packages/cli/src/commands/init.ts

@@ -453,7 +453,6 @@ async function processInitForm(
           // @ts-expect-error TODO: wait what?
           availableNetworks
             .get(protocol as ProtocolName) // Get networks related to the chosen protocol.
-            // @ts-expect-error TODO: wait what?
             .toArray()
         ); // Needed because of gluegun. It can't even receive a JS iterable.
       },

packages/cli/src/protocols/index.ts

@@ -116,14 +116,17 @@ export default class Protocol {
         'uni-3', // Juno testnet
       ],
       substreams: ['mainnet'],
-    }) as immutable.Map<'arweave' | 'ethereum' | 'near' | 'cosmos' | 'substreams', string[]>;
+    }) as immutable.Map<
+      'arweave' | 'ethereum' | 'near' | 'cosmos' | 'substreams',
+      immutable.List<string>
+    >;
 
     const allNetworks: string[] = [];
     networks.forEach(value => {
       allNetworks.push(...value);
     });
 
-    networks = networks.set('substreams', allNetworks);
+    networks = networks.set('substreams', immutable.List(allNetworks));
 
     return networks;
   }