### Update drupal core to 8.4

It can be messy to upadte the core, which was the case for me for a few projects because of some dependencies. The main problem was the doctrine being not compatible with < PHP 7.1

{
“doctrine/annotations”: “1.2.7",
“doctrine/cache”: “v1.6.1",
“doctrine/collections”: “v1.3.0",
“doctrine/common”: “v2.7.2",
“doctrine/instantiator”: “1.0.5",
}	   

If you face problems with the foundation sites, you should follow the steps below

It will ask to choose the jquery version, choose 3.2.1 version