deps(dev): bump @libp2p/interface-mocks from 4.0.3 to 6.0.1 (#192)

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

package.json

@@ -156,7 +156,7 @@
     "wherearewe": "^2.0.1"
   },
   "devDependencies": {
-    "@libp2p/interface-mocks": "^4.0.3",
+    "@libp2p/interface-mocks": "^6.0.1",
     "@libp2p/interface-transport-compliance-tests": "^2.0.6",
     "@mapbox/node-pre-gyp": "^1.0.8",
     "aegir": "^37.5.3",