chore(fileop) drop legacy support

Author: coderaiser

.browserslistrc

@@ -0,0 +1,5 @@
+last 2 Chrome versions
+last 2 Safari versions
+Firefox ESR
+maintained node versions
+not dead

client/fileop.js

@@ -1,6 +1,6 @@
 'use strict';
 
-const Emitify = require('emitify/legacy');
+const Emitify = require('emitify');
 const getHost = require('./get-host');
 const loadSocket = require('./load-socket');
 const operator = require('./operator');

client/operator.js

@@ -1,6 +1,6 @@
 'use strict';
 
-const Emitify = require('emitify/legacy');
+const Emitify = require('emitify');
 
 module.exports = (id, socket) => {
     return new FileOperator(id, socket);