rename feature-list to middleware-list.. fix --version

lib/command/middleware-list.js

@@ -1,6 +1,6 @@
-class FeatureList {
+class MiddlewareList {
   description () {
-    return 'Print installed features'
+    return 'Print available middleware'
   }
   execute (options) {
     const list = [
@@ -22,4 +22,4 @@ class FeatureList {
   }
 }
 
-module.exports = FeatureList
+module.exports = MiddlewareList

lib/command/serve.js

@@ -54,7 +54,7 @@ class WsServe extends ServeCommand {
   }
 
   showVersion () {
-    const pkg = require(path.resolve(__dirname, '..', 'package.json'))
+    const pkg = require(path.resolve(__dirname, '..', '..', 'package.json'))
     console.log(pkg.version)
   }
 }