This way the phpunit dependencies can be pinned.

It's likely it will work with newer versions. This makes it easier to test it.

Remove git-hooks so app can be installed with "composer create-project" without being a git repository

Some config keys changed as well since the last update

This reverts commit 2535de6a.

While it's not stricly required by everyone it doesn't require any
extra implementation right now and is required by all frontend apps
in the future, so including it should make the initial setup easier.