Update dependencies with security vulnerabilities.

Author: RubenVerborgh

lib/models/token-service.js

@@ -1,6 +1,5 @@
 'use strict'
 
-const moment = require('moment')
 const ulid = require('ulid')
 
 class TokenService {
@@ -12,7 +11,7 @@ class TokenService {
     const token = ulid()
 
     const value = {
-      exp: moment().add(20, 'minutes')
+      exp: new Date(Date.now() + 20 * 60 * 1000)
     }
 
     this.tokens[token] = Object.assign({}, value, data)