* Revert "Get rid of phpstan/phpstan-strict-rules"
This reverts commit ff59ade31a.
* drop phpstan baseline
* fix foreach phpstan issue
* adjust for rebase
* fix method call case
* ignore one phpstan error even after isset
* Check plugins composer.json using CI
* Add "require-dev" and "config.allow-plugins" to plugins
* fix composer.json format - rm invalid email
* fix composer.json format - fix ext require
* fix composer.json format - fix plugin name
* tmp
* Revert "tmp"
* fix ext in ext install
* disable plugin in plugin install until Roundcube is fully autoloadable
* fix composer.json format - fix non-canonical license name
* Revert "Add "require-dev" and "config.allow-plugins" to plugins"
* no composer install for plugins needed
* Revert "fix ext in ext install"
* add standard "Test" suffix to phpunit files
* rm unneeded "suffix" in phpunit config
* simplify phpunit config
* fix default "xhtml" doctype in unit testing
* fix test_format_date test to not rely on other tests
* even more phpunit config simplify
* stricter/unify phpunit params for E2E tests
* run E2E tests on maximal php version too with lowest deps
* "repositories" in bundled plugins are useless as for root package only
* add/unify missing plugin test
