chore(*): update dev dependencies

packages/xo-server-load-balancer/package.json

@@ -36,14 +36,14 @@
     "lodash": "^4.16.2"
   },
   "devDependencies": {
-    "babel-cli": "^6.16.0",
-    "babel-eslint": "^7.0.0",
+    "babel-cli": "^6.24.1",
+    "babel-eslint": "^7.2.3",
     "babel-plugin-lodash": "^3.2.9",
-    "babel-plugin-transform-runtime": "^6.15.0",
-    "babel-preset-es2015": "^6.16.0",
-    "babel-preset-stage-0": "^6.16.0",
-    "dependency-check": "^2.5.1",
-    "standard": "^8.2.0"
+    "babel-plugin-transform-runtime": "^6.23.0",
+    "babel-preset-es2015": "^6.24.1",
+    "babel-preset-stage-0": "^6.24.1",
+    "dependency-check": "^2.9.1",
+    "standard": "^10.0.2"
   },
   "scripts": {
     "build": "NODE_ENV=production babel --source-maps --out-dir=dist/ src/",

packages/xo-server-load-balancer/src/index.js

@@ -14,8 +14,6 @@ import {
   debug
 } from './utils'
 
-class Emitter extends EventEmitter {}
-
 // ===================================================================
 
 const PERFORMANCE_MODE = 0
@@ -104,7 +102,7 @@ export const configurationSchema = {
 const makeJob = (cronPattern, fn) => {
   const job = {
     running: false,
-    emitter: new Emitter()
+    emitter: new EventEmitter()
   }
 
   job.cron = new CronJob(cronPattern, async () => {
@@ -117,7 +115,7 @@ const makeJob = (cronPattern, fn) => {
     try {
       await fn()
     } catch (error) {
-      console.error('[WARN] scheduled function:', error && error.stack || error)
+      console.error('[WARN] scheduled function:', (error && error.stack) || error)
     } finally {
       job.running = false
       job.emitter.emit('finish')
@@ -136,7 +134,6 @@ class LoadBalancerPlugin {
   constructor (xo) {
     this.xo = xo
     this._job = makeJob(`*/${EXECUTION_DELAY} * * * *`, ::this._executePlans)
-    this._emitter
   }
 
   async configure ({ plans }) {

packages/xo-server-load-balancer/src/performance-plan.js

@@ -132,7 +132,5 @@ export default class PerformancePlan extends Plan {
 
     await Promise.all(promises)
     debug(`Performance mode: ${optimizationsCount} optimizations for Host (${exceededHost.id}).`)
-
-    return
   }
 }