feat: support yamux muxer (#11)

Note: elastic-ipfs/bitswap-peer#205 needs to
merge before yamux will be used with the default peer.

p2p.js

@@ -2,6 +2,7 @@ import { createLibp2p } from 'libp2p'
 import { webSockets } from '@libp2p/websockets'
 import { tcp } from '@libp2p/tcp'
 import { noise } from '@chainsafe/libp2p-noise'
+import { yamux } from '@chainsafe/libp2p-yamux'
 import { mplex } from '@libp2p/mplex'
 import debug from 'debug'
 import { multiaddr } from '@multiformats/multiaddr'
@@ -21,7 +22,10 @@ const log = debug('dagula:p2p')
 export async function getLibp2p () {
   const libp2p = await createLibp2p({
     transports: [webSockets(), tcp()],
-    streamMuxers: [mplex({ maxMsgSize: 4 * 1024 * 1024 })],
+    streamMuxers: [
+      yamux({ direction: 'outbound' }),
+      mplex({ maxMsgSize: 4 * 1024 * 1024 })
+    ],
     connectionEncryption: [noise()]
   })
   await libp2p.start()