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

lib/command/middleware-list.js

@@ -0,0 +1,25 @@
+class MiddlewareList {
+  description () {
+    return 'Print available middleware'
+  }
+  execute (options) {
+    const list = [
+      'lws-log',
+      'lws-cors',
+      'lws-json',
+      'lws-rewrite',
+      'lws-body-parser',
+      'lws-blacklist',
+      'lws-conditional-get',
+      'lws-mime',
+      'lws-compress',
+      'lws-mock-response',
+      'lws-spa',
+      'lws-static',
+      'lws-index'
+    ]
+    console.log(list)
+  }
+}
+
+module.exports = MiddlewareList