title: Sequelize: updating updatedAt manually
body: <p>Below is the code I am using in Hooks to update the <code>updatedAt</code> column for two objects:</p>
  
  <pre><code>hooks: {
                  afterUpdate: (group, options, callback) =&gt; {
                      console.log("groudId " + groupId + " options " + options)
                  },
                  afterCreate: (member, options, callback) =&gt; {
                      return new Promise((resolve, reject) =&gt; {
                          sequelize.models.Group.findOne({
                              where: {
                                  id: member.group_id
                              }
                          }).then((group) =&gt; {
                              if (group) {
                                  var date = new Date();
                                  console.log("BEFORE group.updatedAt " + group.updatedAt)
                                  group.dataValues.updatedAt = new Date()
                                  console.log("CHANGED group.updatedAt " + group.updatedAt)
                                  group.save().then((Group) =&gt; {
                                      if (Group) {
                                          console.log("UPDATED Group.updatedAt " + Group.updatedAt)
                                          console.log("UPDATED group.updatedAt " + group.updatedAt)
                                          resolve(Group)
                                      } else {
                                          console.log("NO GROUP Found")
                                          return reject(group.id)
                                      }
                                  }).catch((error) =&gt; {
                                      return (error)
                                  })
                              } else {
                                  return reject(id)
                              }
                          }).catch((error) =&gt; {
                              return (reject)
                          })
                      })
                  }
  </code></pre>
  
  <p>Console Log:</p>
  
  <pre><code>BEFORE group.updatedAt Fri Feb 17 2017 17:36:00 GMT-0800 (PST)
  CHANGED group.updatedAt Tue Feb 28 2017 14:00:17 GMT-0800 (PST)
  UPDATED Group.updatedAt Tue Feb 28 2017 14:00:17 GMT-0800 (PST)
  UPDATED group.updatedAt Tue Feb 28 2017 14:00:17 GMT-0800 (PST)
  BEFORE group.updatedAt Fri Feb 17 2017 17:36:00 GMT-0800 (PST)
  CHANGED group.updatedAt Tue Feb 28 2017 14:00:19 GMT-0800 (PST)
  UPDATED Group.updatedAt Tue Feb 28 2017 14:00:19 GMT-0800 (PST)
  UPDATED group.updatedAt Tue Feb 28 2017 14:00:19 GMT-0800 (PST)
  </code></pre>
  
  <p>While the log, what I think, appears correct, why isn't the actual object in the DB updated to the new <code>updatedAt</code> value?  Or is there an <strong>easier</strong> way to update an objects <code>updatedAt</code> column?</p>