Automatically run yarn install when we detect a tag/version change

[srosset81]

I don't know if it's related to yarn link or something else, but very often when we change the version of the middleware packages, we end up with versions mismatch: some packages are linking old versions of other packages.

This is generally resolved by running yarn install on /src/middleware

Documenting this could be difficult.

If we could set some git hooks to automatically run yarn install when there is a tag/version change after a pull, that could help developers to avoid annoying bugs.