Review dependencies that block composer from downloading anu when the minimum stability is "stable" instead of "dev"

Requiring root composer projects to change their config like
```
composer config minimum-stability dev
```
is asking developer to relax their policies too much. A closer look at the dependencies should yield what are the problematic areas.

Expected outcome:
List those problematic dependencies and a small roadmap to get rid of them in the readme or any other file.