Consider updating to htmlmin2 for Python 3.13 compatibility

[gianluca-nitti]

pip install json-schema-for-humans currently fails on Python 3.13 because the htmlmin dependency uses the removed cgi module:

$ docker run -it --rm python:alpine /bin/sh
/ # pip install json-schema-for-humans
Collecting json-schema-for-humans
  Downloading json_schema_for_humans-1.0.2-py3-none-any.whl.metadata (11 kB)
Collecting Jinja2>3 (from json-schema-for-humans)
  Downloading jinja2-3.1.4-py3-none-any.whl.metadata (2.6 kB)
Collecting MarkupSafe<3.0,>=2.0 (from json-schema-for-humans)
  Downloading MarkupSafe-2.1.5.tar.gz (19 kB)
  Installing build dependencies ... done
  Getting requirements to build wheel ... done
  Preparing metadata (pyproject.toml) ... done
Collecting PyYAML<7,>=5.4.1 (from json-schema-for-humans)
  Downloading PyYAML-6.0.2-cp313-cp313-musllinux_1_1_x86_64.whl.metadata (2.1 kB)
Collecting Pygments<3.0.0,>=2.10.0 (from json-schema-for-humans)
  Downloading pygments-2.18.0-py3-none-any.whl.metadata (2.5 kB)
Collecting click<9.0.0,>=8.0.1 (from json-schema-for-humans)
  Downloading click-8.1.7-py3-none-any.whl.metadata (3.0 kB)
Collecting dataclasses-json<0.6.0,>=0.5.6 (from json-schema-for-humans)
  Downloading dataclasses_json-0.5.9-py3-none-any.whl.metadata (22 kB)
Collecting htmlmin<0.2.0,>=0.1.12 (from json-schema-for-humans)
  Downloading htmlmin-0.1.12.tar.gz (19 kB)
  Installing build dependencies ... done
  Getting requirements to build wheel ... error
  error: subprocess-exited-with-error
  
  × Getting requirements to build wheel did not run successfully.
  │ exit code: 1
  ╰─> [27 lines of output]
      Traceback (most recent call last):
        File "/usr/local/lib/python3.13/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 353, in <module>
          main()
          ~~~~^^
        File "/usr/local/lib/python3.13/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 335, in main
          json_out['return_val'] = hook(**hook_input['kwargs'])
                                   ~~~~^^^^^^^^^^^^^^^^^^^^^^^^
        File "/usr/local/lib/python3.13/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 118, in get_requires_for_build_wheel
          return hook(config_settings)
        File "/tmp/pip-build-env-5k18y7tq/overlay/lib/python3.13/site-packages/setuptools/build_meta.py", line 332, in get_requires_for_build_wheel
          return self._get_build_requires(config_settings, requirements=[])
                 ~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
        File "/tmp/pip-build-env-5k18y7tq/overlay/lib/python3.13/site-packages/setuptools/build_meta.py", line 302, in _get_build_requires
          self.run_setup()
          ~~~~~~~~~~~~~~^^
        File "/tmp/pip-build-env-5k18y7tq/overlay/lib/python3.13/site-packages/setuptools/build_meta.py", line 503, in run_setup
          super().run_setup(setup_script=setup_script)
          ~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^
        File "/tmp/pip-build-env-5k18y7tq/overlay/lib/python3.13/site-packages/setuptools/build_meta.py", line 318, in run_setup
          exec(code, locals())
          ~~~~^^^^^^^^^^^^^^^^
        File "<string>", line 4, in <module>
        File "/tmp/pip-install-m847zy3q/htmlmin_7c64c67dc11b44eb9ccf071510f24217/htmlmin/__init__.py", line 28, in <module>
          from .main import minify, Minifier
        File "/tmp/pip-install-m847zy3q/htmlmin_7c64c67dc11b44eb9ccf071510f24217/htmlmin/main.py", line 28, in <module>
          import cgi
      ModuleNotFoundError: No module named 'cgi'
      [end of output]
  
  note: This error originates from a subprocess, and is likely not a problem with pip.
error: subprocess-exited-with-error

× Getting requirements to build wheel did not run successfully.
│ exit code: 1
╰─> See above for output.

note: This error originates from a subprocess, and is likely not a problem with pip.
/ # 

The htmlmin project however seems inactive.

An alternative could be the htmlmin2 fork which installs fine on 3.13.

[leoxlin]

+1 On this. We are also running into failures in our pipeline due to the 3.13 removal of cgi. htmlmin2 is the active fork for htmlmin