chore: run node tests in ci (#1057)

Looks like this project stopped running the `test:node` npm script when it was migrated to gh actions.

Re-enable it and fix all the related test failures.

test/content-routing/utils.js

@@ -13,9 +13,6 @@ const routingOptions = mergeOptions(baseOptions, {
   config: {
     dht: {
       kBucketSize: 20,
-      randomWalk: {
-        enabled: true
-      },
       enabled: true
     }
   }