Add phpstan level 0 (#1022)

* Remove unused arguments

* Fix return types

* Removed unused parameter and argument

* Add phpstan job

* merge files

* Delete phpstan-baseline.neon

* Delete static-analysis.yml

* merge workflows

* Update composer.json

* format yaml

* install composer reps

* fix yaml

Co-authored-by: Till Krüss <tillkruss@users.noreply.github.com>

tests/Predis/Collection/Iterator/HashKeyTest.php

@@ -483,7 +483,7 @@ class HashKeyTest extends PredisTestCase
             ->method('getCommandFactory')
             ->willReturn($this->getCommandFactory());
         $client
-            ->expects($this->once(1))
+            ->expects($this->once())
             ->method('hscan')
             ->withConsecutive(
                 ['key:hash', 0, ['MATCH' => 'field:*', 'COUNT' => 2]]