docs: update readme to be async (libp2p#11)

docs: add badges

License: MIT
Signed-off-by: Jacob Heun <jacobheun@gmail.com>

README.md

@@ -1,5 +1,13 @@
 # js-libp2p-delegated-content-routing
 
+[![](https://img.shields.io/badge/made%20by-Protocol%20Labs-blue.svg?style=flat-square)](http://protocol.ai)
+[![](https://img.shields.io/badge/project-libp2p-yellow.svg?style=flat-square)](http://libp2p.io/)
+[![](https://img.shields.io/badge/freenode-%23libp2p-yellow.svg?style=flat-square)](http://webchat.freenode.net/?channels=%23libp2p)
+[![Discourse posts](https://img.shields.io/discourse/https/discuss.libp2p.io/posts.svg)](https://discuss.libp2p.io)
+[![](https://img.shields.io/codecov/c/github/libp2p/js-libp2p-delegated-content-routing.svg?style=flat-square)](https://codecov.io/gh/libp2p/js-libp2p-delegated-content-routing)
+[![](https://img.shields.io/travis/libp2p/js-libp2p-delegated-content-routing.svg?style=flat-square)](https://travis-ci.com/libp2p/js-libp2p-delegated-content-routing)
+[![Dependency Status](https://david-dm.org/libp2p/js-libp2p-delegated-content-routing.svg?style=flat-square)](https://david-dm.org/libp2p/js-libp2p-delegated-content-routing)
+
 Leverage other peers in the network to perform Content Routing calls.
 
 ## Lead Maintainer
@@ -18,22 +26,14 @@ const routing = new DelegatedContentRouing(peerId, {
   port: 443,
   host: 'ipfs.io'
 })
+const cid = new CID('QmS4ustL54uo8FzR9455qaxZwuMiUhyvMcX9Ba8nUH4uVv')
 
-routing.findProviders(key, (err, peerInfos) => {
-  if (err) {
-    return console.error(err)
-  }
-
-  console.log('found peers', peerInfos)
-})
+for await (const peerInfo of routing.findProviders(cid)) {
+  console.log('found peer', peerInfo)
+}
 
-routing.provide(key, (err) => {
-  if (err) {
-    return console.error(err)
-  }
-
-  console.log('providing %s', key)
-})
+await routing.provide(cid)
+console.log('providing %s', cid.toBaseEncodedString())
 ```
 
 ## License