fix server reload

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "behavior3editor",
-  "version": "0.1.4",
+  "version": "0.1.9",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
@@ -1274,7 +1274,8 @@
       "version": "3.0.1",
       "resolved": "https://registry.npm.taobao.org/boolean/download/boolean-3.0.1.tgz",
       "integrity": "sha1-NezytKLuGRsLRJhvFOtfBSpcu08=",
-      "dev": true
+      "dev": true,
+      "optional": true
     },
     "boxen": {
       "version": "4.2.0",