[RUNTIME] Bump required Python version (#619)
[RUNTIME] Bump required Python version (#619)

Runtime uses certain features that only work in Python 3.6+, so the Pipfile has been updated accordingly.
pioneers/PieCentral,pioneers/PieCentral,pioneers/PieCentral,pioneers/PieCentral,pioneers/PieCentral,pioneers/PieCentral,pioneers/PieCentral