Log Message:
py-joblib: updated to 0.12.2

Release 0.12.2:
Integrate loky 2.2.0 to fix regression with unpicklable arguments and functions \ 
reported by users.
Loky 2.2.0 also provides a protection against memory leaks long running \ 
applications when psutil is installed.
Joblib now includes the code for the dask backend which has been updated to \ 
properly handle nested parallelism and data scattering at the same time.
Restored some private API attribute and arguments (MemorizedResult.argument_hash \ 
and BatchedCalls.__init__'s pickle_cache) for backward compat.
Fix a deprecation warning message (for Memory's cachedir).

Release 0.12.1:
Make sure that any exception triggered when serializing jobs in the queue will \ 
be wrapped as a PicklingError as in past versions of joblib.
Fix kwonlydefaults key error in filter_args