pdoc now reports submodules in __all__ as variables

[mitsuhiko]

With the last release version a submodule mentioned in __all__ would be reported as a module. Now it's reported as variable as well as a module but the links are broken.

integrations here is a module in fact (mentioned in __all__):

In the selector below the module in __all__ has a different name than others (and the link is broken):

This change is likely related to #170