PyQT5 missing from dependencies

[paulglx]

PyQT5 is missing from the dependencies and this raises an error when running graph-cli on macOS.

Full error :

> graph .monitoring/exported_data/cometbft_mempool_tx_size_bytes_bucket.csv
Traceback (most recent call last):
  File "/Users/paul/.pyenv/versions/3.11.8/bin/graph", line 8, in <module>
    sys.exit(main.main())

[...]

  File "/Users/paul/.pyenv/versions/3.11.8/lib/python3.11/site-packages/matplotlib/backends/backend_qt5agg.py", line 7, in <module>
    from .backend_qtagg import (    # noqa: F401, E402 # pylint: disable=W0611
  File "/Users/paul/.pyenv/versions/3.11.8/lib/python3.11/site-packages/matplotlib/backends/backend_qtagg.py", line 9, in <module>
    from .qt_compat import QT_API, QtCore, QtGui
  File "/Users/paul/.pyenv/versions/3.11.8/lib/python3.11/site-packages/matplotlib/backends/qt_compat.py", line 130, in <module>
    raise ImportError(
ImportError: Failed to import any of the following Qt binding modules: PyQt5, PySide2

Fix

This is fixed by running pip install pyqt5

[mcastorina]

Thanks for reporting! There was a previous discussion about this in #22.

The tldr from that issue was that adding PyQt5 as a dependency broke pip installations on ubuntu for some reason, so I removed it in this commit.

I must be doing something wrong with setup.py, but for now I think it'll be helpful to add a note to the README.

Contributions welcome for either case!