Pitivi cannot be started as it cannot import MouseButton from matplotlib.

Error Message:
bash> pitivi
Traceback (most recent call last):
  File "/usr/bin/pitivi", line 172, in <module>
    _run_pitivi()
  File "/usr/bin/pitivi", line 143, in _run_pitivi
    from pitivi import application
  File "/usr/lib64/pitivi/python/pitivi/application.py", line 32, in <module>
    from pitivi.mainwindow import MainWindow
  File "/usr/lib64/pitivi/python/pitivi/mainwindow.py", line 29, in <module>
    from pitivi.editorperspective import EditorPerspective
  File "/usr/lib64/pitivi/python/pitivi/editorperspective.py", line 41, in
<module>
    from pitivi.timeline.timeline import TimelineContainer
  File "/usr/lib64/pitivi/python/pitivi/timeline/timeline.py", line 37, in
<module>
    from pitivi.timeline.elements import Clip
  File "/usr/lib64/pitivi/python/pitivi/timeline/elements.py", line 30, in
<module>
    from matplotlib.backend_bases import MouseButton
ImportError: cannot import name 'MouseButton'

Installed packages:
bash> zypper search -s -i matplotlib
Loading repository data...
Reading installed packages...

S  | Name                     | Type    | Version          | Arch   |
Repository
---+--------------------------+---------+------------------+--------+-----------------------
i+ | python3-matplotlib       | package | 2.2.5-150400.9.4 | x86_64 |
openSUSE-Leap_15.4-OSS
i+ | python3-matplotlib-cairo | package | 2.2.5-150400.9.4 | x86_64 |
openSUSE-Leap_15.4-OSS
i+ | python3-matplotlib-gtk3  | package | 2.2.5-150400.9.4 | x86_64 |
openSUSE-Leap_15.4-OSS
i+ | python3-matplotlib-qt5   | package | 2.2.5-150400.9.4 | x86_64 |
openSUSE-Leap_15.4-OSS
i+ | python3-matplotlib-tk    | package | 2.2.5-150400.9.4 | x86_64 |
openSUSE-Leap_15.4-OSS

I found out, that the matplotlib provided by the release 15.4 is too old. It is
version 2.2.5, while Mousebutton seems to be introduced around version 3.1.0.
In the version 2.2.5 MouseButton was not yet implemented as you can see under:
https://matplotlib.org/2.2.5/api/backend_bases_api.html. While in 3.1.0 it is
documented: https://matplotlib.org/3.1.0/api/backend_bases_api.html