Skeleton for 'pickle' module (PY-13432)
add skeleton for NumPy ndarray math
Merge branch 'master' of git.labs.intellij.net:python-skeletons
update numpy skeleton docstrings
PY-4073 Add completion for special function attributes

* Introduce new '__function' fake class for functions. Add its skeleton to user skeletons
and binary skeletons generator. Delegate to it in PyFunctionType for completion variants
and attributes resolution.
*  Regenerate test SDKs to use new class.
Merge branch 'master' of https://github.com/JetBrains/python-skeletons