Stefan Bürk authored Jan 16, 2022 and Christian Kuhn committed Jan 29, 2022

We currently have the situation that phpstan is
hard to update and maintain due to the phpstan
config file that sets very specific rulesets.

This is unfortunate since phpstan tends to change
and rename rules at will.

The general usage API of phpstan is basically as
follows: Have a slim config file that sets the
basic level. Then maintain a 'baseline' file that
lists violations, using the --generate-baseline
command option. The todo job for people working
on phpstan errors is then to look at the baseline
file, pick up some issues, fix them, then re-generate
baseline. When baseline is small enough, the level
is raised, a new baseline is generated, and the
fix-job starts again.

The patch does exactly this: The existing config
is dropped and runTests.sh receives a command to
generate baseline.

With this in place, we can easily raise phpstan
to a PHP 8.1 compatible version:

> composer req friendsoftypo3/phpstan-typo3:"^0.9.0" --dev
> composer req phpstan/phpstan:"...