They seem to cause trouble, also inconsistent behaviour between versions of the memcached extension.

This was available for the memcache extension, but when we moved to memcached it went away since the API is different and required changes. The issue with persitence in memcached is that persistent connections require a common identifier, which shouldn't be fixed. Therefore, we need to change a bit the way the memcache servers are configured in config.php as well.

Bumps [acorn](https://github.com/acornjs/acorn) from 6.3.0 to 6.4.1.
- [Release notes](https://github.com/acornjs/acorn/releases)
- [Commits](https://github.com/acornjs/acorn/compare/6.3.0...6.4.1

)

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

As this is the file codecov reads.

post.* has been added directly under assets for now, tried it
via webpack but this added a several times overhead to these
very small files, so this seemed the cleanest solution for now.
But might be improved upon.