FreeBSD Port: py36-matplotlib-2.2.3 new dependence?

[Alex V. Petrov]

after update port to py36-matplotlib-2.2.3:

Traceback (most recent call last):
  File "./plot_graph.py", line 6, in <module>
    import matplotlib.pyplot as plt
  File "/usr/local/lib/python3.6/site-packages/matplotlib/pyplot.py",
line 31, in <module>
    import matplotlib.colorbar
  File "/usr/local/lib/python3.6/site-packages/matplotlib/colorbar.py",
line 38, in <module>
    import matplotlib.gridspec as gridspec
  File "/usr/local/lib/python3.6/site-packages/matplotlib/gridspec.py",
line 29, in <module>
    import matplotlib._layoutbox as layoutbox
  File
"/usr/local/lib/python3.6/site-packages/matplotlib/_layoutbox.py", line
23, in <module>
    import kiwisolver as kiwi
ModuleNotFoundError: No module named 'kiwisolver'

-- 
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Alex.