fix: pass connection encryption module to libp2p

Since the `v0.28.1` point release, libp2p now requires a connection
enryption module to be passed in config, otherwise it throws.

See: libp2p/js-libp2p#665

packages/ipfs/test/core/libp2p.spec.js

@@ -7,6 +7,7 @@ const PeerId = require('peer-id')
 const Libp2p = require('libp2p')
 const EE = require('events')
 const libp2pComponent = require('../../src/core/components/libp2p')
+const Crypto = require('libp2p-secio')
 
 class DummyTransport {
   get [Symbol.toStringTag] () {
@@ -32,7 +33,7 @@ class DummyDiscovery extends EE {
   }
 }
 
-describe('libp2p customization', function () {
+describe.only('libp2p customization', function () {
   // Provide some extra time for ci since we're starting libp2p nodes in each test
   this.timeout(25 * 1000)
 
@@ -77,7 +78,7 @@ describe('libp2p customization', function () {
           libp2p: (opts) => {
             return new Libp2p({
               peerId: opts.peerId,
-              modules: { transport: [DummyTransport] },
+              modules: { transport: [DummyTransport], connEncryption: [ Crypto ] },
               config: { relay: { enabled: false } }
             })
           }
@@ -101,7 +102,7 @@ describe('libp2p customization', function () {
           libp2p: (opts) => {
             return new Libp2p({
               peerId: opts.peerId,
-              modules: { transport: [DummyTransport] },
+              modules: { transport: [DummyTransport], connEncryption: [ Crypto ] },
               config: { relay: { enabled: false } }
             })
           }