Ignore some irrelevant PHPStan errors in test files

phpstan/config.neon

@@ -35,6 +35,11 @@ parameters:
         # Mock errors
         - '~^Call to an undefined method (PHPUnit\\Framework\\MockObject\\MockObject|Prophecy\\Prophecy\\ObjectProphecy)::.*$~'
 
+        # Ignore some irrelevant errors in test files
+        - '~Method Composer\\Test\\[^:]+::(setUp(BeforeClass)?|tearDown(AfterClass)?|test[^(]+|get[^(]*?Mock[^(]*)\(\) has no return typehint specified.~'
+        - '~Method Composer\\Test\\[^:]+::test[^(]+\(\) has parameter \$\w+ with no typehint specified.~'
+        - '~Method Composer\\Test\\[^:]+::(data\w+|provide\w+|\w+Provider)\(\) has no return typehint specified.~'
+
         # Level 6 TODO
         #- '~parameter .*? with no typehint specified.$~'
         #- '~parameter .*? with no value type specified in iterable type array.$~'