chore: remove peer deps

We added peer deps to signal to the user that they should add the modules they depend on as deps of their project.

Starting with npm7 all peer deps get installed automatically which defeats the purpose of our use of peer deps, so let's remove them.

package.json

@@ -66,9 +66,6 @@
     "time-cache": "^0.3.0",
     "uint8arrays": "^2.1.4"
   },
-  "peerDependencies": {
-    "libp2p": "^0.30.0"
-  },
   "contributors": [
     "David Dias <daviddias.p@gmail.com>",
     "Vasco Santos <vasco.santos@moxy.studio>",