Required minimum fpdf2 version

[MartinThoma]

tests/test_cat.py::test_cat_combine_files - TypeError: cell() got an unexpected keyword argument 'text'

was fixed with:

pip install fpdf2 --upgrade
Requirement already satisfied: fpdf2 in /home/moose/.pyenv/versions/3.8.3/lib/python3.8/site-packages (2.4.1)
Collecting fpdf2
  Downloading fpdf2-2.8.1-py2.py3-none-any.whl.metadata (63 kB)
     ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 63.1/63.1 kB 420.9 kB/s eta 0:00:00
Collecting defusedxml (from fpdf2)
  Using cached defusedxml-0.7.1-py2.py3-none-any.whl.metadata (32 kB)
Requirement already satisfied: Pillow!=9.2.*,>=6.2.2 in /home/moose/.pyenv/versions/3.8.3/lib/python3.8/site-packages (from fpdf2) (8.4.0)
Collecting fonttools>=4.34.0 (from fpdf2)
  Downloading fonttools-4.55.2-cp38-cp38-manylinux_2_17_x86_64.manylinux2014_x86_64.whl.metadata (165 kB)
     ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 165.0/165.0 kB 1.1 MB/s eta 0:00:00
Downloading fpdf2-2.8.1-py2.py3-none-any.whl (227 kB)
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 227.8/227.8 kB 1.1 MB/s eta 0:00:00
Downloading fonttools-4.55.2-cp38-cp38-manylinux_2_17_x86_64.manylinux2014_x86_64.whl (4.7 MB)
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 4.7/4.7 MB 1.9 MB/s eta 0:00:00
Using cached defusedxml-0.7.1-py2.py3-none-any.whl (25 kB)
Installing collected packages: fonttools, defusedxml, fpdf2
  Attempting uninstall: fpdf2
    Found existing installation: fpdf2 2.4.1
    Uninstalling fpdf2-2.4.1:
      Successfully uninstalled fpdf2-2.4.1
Successfully installed defusedxml-0.7.1 fonttools-4.55.2 fpdf2-2.8.1

We should set a minimum version:

• https://github.com/py-pdf/pdfly/blob/main/pyproject.toml#L39