Update some dev-dependencies to fix vulnerability issues

[Kocal]

We have some vulnerability alerts raised by Dependabot https://github.com/symfony/webpack-encore/security/dependabot?q=is%3Aopen+manifest%3Ayarn.lock

The PR won't impact the end users, they probably already updated the dependencies themselves, it's only some maintenance... :)

The following dependencies are updated to their patched version:

• braces
• webpack-dev-middleware
• express
• follow-redirects

The following dependencies are not updated, as it requires major updates that can break user-land:

• ws, used by webpack-dev-server (need one major update)
• @adobe/css-tools, used by stylus (needs three major updates)
• tough-cookie and request, used by the archived package zombie, there are no new releases, so we must find a replacment
• vue-template-compiler, we must drop Vue 2 support before