Complete PHPStan Level 6 (#5305)

* Complete PHPStan Level 6
Fix https://github.com/FreshRSS/FreshRSS/issues/4112
And initiate PHPStan Level 7

* PHPStan Level 6 for tests
* Use phpstan/phpstan-phpunit
* Update to PHPStan version 1.10

* Fix mixed bug

* Fix mixed return bug

* Fix paginator bug

* Fix FreshRSS_UserConfiguration

* A couple more Minz_Configuration bug fixes

* A few trivial PHPStan Level 7 fixes

* A few more simple PHPStan Level 7

* More files passing PHPStan Level 7
Add interface to replace removed class from https://github.com/FreshRSS/FreshRSS/pull/5251

* A few more PHPStan Level 7 preparations

* A few last details

1 files changed, 43 insertions, 5 deletions

diff --git a/tests/phpstan-next.txt b/tests/phpstan-next.txt
index 5b5b33e45..e2e081ecf 100644
--- a/tests/phpstan-next.txt
+++ b/tests/phpstan-next.txt
@@ -1,10 +1,48 @@
-# List of files, which are not yet passing PHPStan level 6 https://phpstan.org/user-guide/rule-levels
-# https://github.com/FreshRSS/FreshRSS/issues/4112
+# List of files, which are not yet passing PHPStan level 7 https://phpstan.org/user-guide/rule-levels
 # Used for automated tests to avoid regressions in files already passing that level.
 # Can be regenerated with something like:
-# find . -type d -name 'vendor' -prune -o -name '*.php' -exec sh -c 'vendor/bin/phpstan analyse --level 6 --memory-limit 512M {} >/dev/null 2>/dev/null || echo {}' \;
+# find . -type d -name 'vendor' -prune -o -name '*.php' -exec sh -c 'vendor/bin/phpstan analyse --level 7 --memory-limit 512M {} >/dev/null 2>/dev/null || echo {}' \;
 
-./app/install.php
+./app/Controllers/configureController.php
+./app/Controllers/feedController.php
+./app/Controllers/importExportController.php
+./app/Controllers/indexController.php
+./app/Controllers/updateController.php
+./app/Controllers/userController.php
+./app/Models/CategoryDAO.php
+./app/Models/Context.php
+./app/Models/DatabaseDAO.php
+./app/Models/DatabaseDAOPGSQL.php
+./app/Models/Entry.php
+./app/Models/EntryDAO.php
 ./app/Models/Feed.php
+./app/Models/FeedDAO.php
+./app/Models/ReadingMode.php
+./app/Models/Search.php
+./app/Models/Share.php
+./app/Models/StatsDAO.php
+./app/Models/TagDAO.php
+./app/Models/Themes.php
+./app/Models/UserQuery.php
+./app/Services/ExportService.php
 ./app/Services/ImportService.php
-./lib/Minz/Paginator.php
+./app/views/helpers/logs_pagination.phtml
+./app/views/index/reader.phtml
+./app/views/stats/index.phtml
+./app/views/stats/repartition.phtml
+./app/views/user/details.phtml
+./cli/check.translation.php
+./cli/delete-user.php
+./cli/do-install.php
+./cli/manipulate.translation.php
+./cli/user-info.php
+./lib/lib_date.php
+./lib/Minz/ActionController.php
+./lib/Minz/Error.php
+./lib/Minz/Mailer.php
+./lib/Minz/Migrator.php
+./lib/Minz/ModelPdo.php
+./lib/Minz/Request.php
+./p/api/greader.php
+./tests/cli/i18n/I18nFileTest.php
+./tests/lib/Minz/MigratorTest.php