• fix substitution of @return static<Foo, Bar> (#2326)
• ignore unused vars preceded by $_ (#2325)
• don’t crash on if ($foo[$bar[0]->baz]) (#2328)
• detect unused variable when used as offset to nested mixed array (#2336)
• fix handling of covariant template params (#2346)
• don’t stub functions unnecessarily (#2340)
• allow empty checks against numeric (#2330)
• don't create array offsets after empty check (#2333)
• allow InvalidReturnType to suppress no-return issues (#2349)
• make sure all functions and methods declare a mixed return type (#2348)