test: fix node-forge for the browser setup

.aegir.js

@@ -0,0 +1,16 @@
+'use strict'
+
+const path = require('path')
+
+module.exports = {
+  webpack: {
+    resolve: {
+      alias: {
+        'node-forge': path.resolve(
+          path.dirname(require.resolve('libp2p-crypto')),
+          '../vendor/forge.bundle.js'
+        )
+      }
+    }
+  }
+}

.travis.yml

@@ -3,6 +3,7 @@ language: node_js
 node_js:
   - 4
   - 5
+  - stable
 
 # Make sure we have new NPM.
 before_install: