community/py3-matplotlib: add missing dep
This fixes
File "/usr/lib/python3.10/site-packages/matplotlib/figure.py", line 3019, in savefig
self.canvas.print_figure(fname, **kwargs)
File "/usr/lib/python3.10/site-packages/matplotlib/backend_bases.py", line 2259, in print_figure
canvas = self._get_output_canvas(backend, format)
File "/usr/lib/python3.10/site-packages/matplotlib/backend_bases.py", line 2184, in _get_output_canvas
canvas_class = get_registered_canvas_class(fmt)
File "/usr/lib/python3.10/site-packages/matplotlib/backend_bases.py", line 144, in get_registered_canvas_class
backend_class = importlib.import_module(backend_class).FigureCanvas
File "/usr/lib/python3.10/importlib/__init__.py", line 126, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 1050, in _gcd_import
File "<frozen importlib._bootstrap>", line 1027, in _find_and_load
File "<frozen importlib._bootstrap>", line 1006, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 688, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 883, in exec_module
File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
File "/usr/lib/python3.10/site-packages/matplotlib/backends/backend_pdf.py", line 47, in <module>
from . import _backend_pdf_ps
File "/usr/lib/python3.10/site-packages/matplotlib/backends/_backend_pdf_ps.py", line 8, in <module>
from fontTools import subset
ModuleNotFoundError: No module named 'fontTools'