fix：use this.options instead of this._options

lib/egg.js

@@ -89,7 +89,7 @@ class EggApplication extends EggCore {
     this.cluster = (clientClass, options) => {
       options = Object.assign({}, this.config.clusterClient, options, {
         // cluster need a port that can't conflict on the environment
-        port: this._options.clusterPort,
+        port: this.options.clusterPort,
         // agent worker is leader, app workers are follower
         isLeader: this.type === 'agent',
         logger: this.coreLogger,

package.json

@@ -20,19 +20,19 @@
     "agentkeepalive": "^3.3.0",
     "cluster-client": "^1.7.1",
     "co": "^4.6.0",
-    "debug": "^3.0.1",
+    "debug": "^3.1.0",
     "delegates": "^1.0.0",
-    "egg-cluster": "^1.12.1",
+    "egg-cluster": "^1.12.4",
     "egg-cookies": "^2.2.1",
-    "egg-core": "^3.13.1",
-    "egg-development": "^1.3.1",
+    "egg-core": "^3.18.0",
+    "egg-development": "^1.3.2",
     "egg-i18n": "^1.2.0",
-    "egg-jsonp": "^1.1.2",
+    "egg-jsonp": "^1.2.1",
     "egg-logger": "^1.6.0",
-    "egg-logrotator": "^2.2.3",
-    "egg-multipart": "^1.5.0",
+    "egg-logrotator": "^2.3.0",
+    "egg-multipart": "^1.5.1",
     "egg-onerror": "^1.5.0",
-    "egg-schedule": "^2.4.1",
+    "egg-schedule": "^2.6.0",
     "egg-security": "^1.12.1",
     "egg-session": "^2.1.1",
     "egg-static": "^1.4.1",
@@ -47,23 +47,23 @@
     "koa-override": "^2.0.0",
     "mime-types": "^2.1.17",
     "sendmessage": "^1.1.0",
-    "urllib": "^2.25.0",
-    "utility": "^1.12.0",
+    "urllib": "^2.25.1",
+    "utility": "^1.13.1",
     "ylru": "^1.2.0"
   },
   "devDependencies": {
     "address": "^1.0.3",
-    "autod": "^2.9.0",
+    "autod": "^2.10.1",
     "autod-egg": "^1.0.0",
     "coffee": "^4.1.0",
     "egg-alinode": "^1.0.3",
-    "egg-bin": "^4.3.3",
+    "egg-bin": "^4.3.5",
     "egg-doctools": "^2.1.0",
-    "egg-mock": "^3.12.2",
+    "egg-mock": "^3.13.1",
     "egg-plugin-puml": "^2.4.0",
     "egg-tracer": "^1.1.0",
     "egg-view-nunjucks": "^2.1.4",
-    "eslint": "^4.7.2",
+    "eslint": "^4.10.0",
     "eslint-config-egg": "^5.1.1",
     "findlinks": "^1.1.0",
     "formstream": "^1.1.0",