feat: remove the need of buyan logger in src/index.js

as buyan can not be consumed by webpack

package.json

@@ -66,7 +66,6 @@
   },
   "dependencies": {
     "bluebird": "^3.5.1",
-    "bunyan": "^1.8.12",
     "ip": "^1.1.5",
     "lodash": "^4.17.15",
     "moment": "^2.22.1",
@@ -77,6 +76,7 @@
     "@commitlint/cli": "^10.0.0",
     "@commitlint/config-conventional": "^16.2.1",
     "@icetee/ftp": "^1.0.2",
+    "bunyan": "^1.8.12",
     "chai": "^4.2.0",
     "condition-circle": "^2.0.2",
     "eslint": "^5.14.1",

src/index.js

@@ -1,7 +1,6 @@
 const _ = require('lodash');
 const Promise = require('bluebird');
 const nodeUrl = require('url');
-const buyan = require('bunyan');
 const net = require('net');
 const tls = require('tls');
 const EventEmitter = require('events');
@@ -13,7 +12,7 @@ class FtpServer extends EventEmitter {
   constructor(options = {}) {
     super();
     this.options = Object.assign({
-      log: buyan.createLogger({name: 'ftp-srv'}),
+      log: console,
       url: 'ftp://127.0.0.1:21',
       pasv_min: 1024,
       pasv_max: 65535,