Update ipfs-api dependency

app/services/ipfs.js

@@ -24,8 +24,8 @@ export default Ember.Service.extend({
   },
 
   getFile(hash) {
-    return this.get('ipfs').cat(hash, { buffer: true }).then(res => {
-      return res.toString();
+    return this.get('ipfs').cat(hash).then(res => {
+      return res.toString('utf8');
     }, err => {
       Ember.Logger.warn('[ipfs] error trying to fetch file', hash, err);
     });

package.json

@@ -51,7 +51,7 @@
     "ember-parachute": "0.1.0",
     "ember-resolver": "^2.0.3",
     "ember-truth-helpers": "1.3.0",
-    "ipfs-api": "^12.1.7",
+    "ipfs-api": "^19.0.0",
     "kosmos-schemas": "^1.1.2",
     "kredits-contracts": "github:67P/truffle-kredits#master",
     "loader.js": "^4.0.10",