Log Message:
Update devel/py-lupa to version 1.4.

Prompted by https://repology.org.

Changes since 1.3:
   * GH#82: Lua coroutines were using the wrong runtime state (patch
     by Sergey Dobrov)
   * GH#81: copy locally provided Lua DLL into installed package on
     Windows (patch by Gareth Coles)
   * built with Cython 0.25.2