use updated multifeed

package.json

@@ -21,6 +21,9 @@
     "cobox-swarm": "git+https://ledger-git.dyne.org/cobox/cobox-swarm",
     "thunky": "^1.1.0"
   },
+  "resolutions": {
+    "cobox-group-base/multifeed": "git+https://github.com/kappa-db/multifeed#fix-keypair-issue"
+  },
   "devDependencies": {
     "nyc": "^14.1.1",
     "rimraf": "^3.0.0",

yarn.lock

@@ -1409,10 +1409,9 @@ multicast-dns@^7.1.1, multicast-dns@^7.2.0:
     dns-packet "^4.0.0"
     thunky "^1.0.2"
 
-multifeed@^5.1.0:
+multifeed@^5.1.0, "multifeed@git+https://github.com/kappa-db/multifeed#fix-keypair-issue":
   version "5.1.0"
-  resolved "https://registry.yarnpkg.com/multifeed/-/multifeed-5.1.0.tgz#71fdfeb3b126eeecb4399f11b50f4c428b1bee47"
-  integrity sha512-pDqv++tRgrbRTA4De/BJ1YqRExbTBpeJhxiKCLf92I6Wrr4uqlOTQA60wW59iXMOpzO/y64RlRkE3oNkrI/CkA==
+  resolved "git+https://github.com/kappa-db/multifeed#919e790543a4106b495f9aa9dd909b22fb87938f"
   dependencies:
     debug "^4.1.0"
     hypercore "^8.3.0"