chore: add discourse badge (#34)

Author: vasco-santos

README.md

@@ -3,6 +3,7 @@
 [![](https://img.shields.io/badge/made%20by-Protocol%20Labs-blue.svg?style=flat-square)](http://ipn.io)
 [![](https://img.shields.io/badge/project-IPFS-blue.svg?style=flat-square)](http://ipfs.io/)
 [![](https://img.shields.io/badge/freenode-%23ipfs-blue.svg?style=flat-square)](http://webchat.freenode.net/?channels=%23ipfs)
+[![Discourse posts](https://img.shields.io/discourse/https/discuss.libp2p.io/posts.svg)](https://discuss.libp2p.io)
 [![standard-readme compliant](https://img.shields.io/badge/standard--readme-OK-green.svg?style=flat-square)](https://github.com/RichardLitt/standard-readme)
 [![Coverage Status](https://coveralls.io/repos/github/libp2p/js-libp2p-keychain/badge.svg?branch=master)](https://coveralls.io/github/libp2p/js-libp2p-keychain?branch=master)
 [![Travis CI](https://travis-ci.org/libp2p/js-libp2p-keychain.svg?branch=master)](https://travis-ci.org/libp2p/js-libp2p-keychain)

package.json

@@ -42,22 +42,22 @@
   },
   "homepage": "https://github.com/libp2p/js-libp2p-keychain#readme",
   "dependencies": {
-    "async": "^2.6.1",
+    "async": "^2.6.2",
     "interface-datastore": "~0.6.0",
     "libp2p-crypto": "~0.16.1",
     "merge-options": "^1.0.1",
     "node-forge": "~0.7.6",
-    "pull-stream": "^3.6.8",
+    "pull-stream": "^3.6.9",
     "sanitize-filename": "^1.6.1"
   },
   "devDependencies": {
-    "aegir": "^18.0.3",
+    "aegir": "^18.2.1",
     "chai": "^4.2.0",
-    "chai-string": "^1.4.0",
-    "datastore-fs": "~0.7.0",
+    "chai-string": "^1.5.0",
+    "datastore-fs": "~0.8.0",
     "datastore-level": "~0.10.0",
     "dirty-chai": "^2.0.1",
-    "level-js": "^4.0.0",
+    "level-js": "^4.0.1",
     "mocha": "^5.2.0",
     "multihashes": "~0.4.14",
     "peer-id": "~0.12.2",