Log Message:
py-tables: updated to 3.5.2

Changes from 3.5.1 to 3.5.2
- Fixed compatibility with python 3.8: Fixed `Dictonary keys changed during
  iteration` RuntimeError while moving/renameing a node.
  Thanks to Christoph Gohlke for reporting and Miro Hroncok for help with
  building PyTables for python 3.8alpha (cython compatibility).
- Fixed a bug in offset calculations producing floats instead of ints
  affecting python 3.