Fix eslint errors

configure.js

@@ -428,12 +428,10 @@ module.exports = (port, spinner) => {
     switch (error.code) {
       case 'EACCES':
         spinner.fail('Listening on port ' + port + ' requires elevated privileges!')
-        process.exit(1)
-        break
+        return process.exit(1)
       case 'EADDRINUSE':
         spinner.fail('Port ' + port + ' is already in use!')
-        process.exit(1)
-        break
+        return process.exit(1)
       default:
         throw error
     }

controllers/ws.js

 'use strict'
 
+/* eslint-disable standard/no-callback-literal */
+
 const _ = require('lodash')
 
 module.exports = (socket) => {

npm/install.js

@@ -132,8 +132,7 @@ pm2.connectAsync().then(() => {
             })
           default:
             console.info(colors.bold.cyan('> Open config.yml in your favorite editor. Then start Wiki.js using: node wiki start'))
-            process.exit(0)
-            break
+            return process.exit(0)
         }
       }).then(() => {
         ora.succeed(colors.bold.green('Wiki.js has been configured and is now running!'))

server.js

@@ -198,12 +198,10 @@ server.on('error', (error) => {
   switch (error.code) {
     case 'EACCES':
       console.error('Listening on port ' + appconfig.port + ' requires elevated privileges!')
-      process.exit(1)
-      break
+      return process.exit(1)
     case 'EADDRINUSE':
       console.error('Port ' + appconfig.port + ' is already in use!')
-      process.exit(1)
-      break
+      return process.exit(1)
     default:
       throw error
   }