- Derived statements starting with functions were not resolved to a type. This
was caused by bugs in `phpinspect--get-derived-statement-type-in-block' and
`phpinspect--interpret-expression-type-in-block'. The division in each
function's functionalities was blurry and both duplicated some of each other's
logic. The situation has now been cleaned up a bit.
- An extra testcase was added for derived statements starting with a function
call
- a bunch of code that broke because of the changes was fixed