Documentation is failing to build and publish since #93 was merged

[madpah]

See https://github.com/CycloneDX/cyclonedx-python-lib/runs/4595932920?check_suite_focus=true.

This appears to be the case since #93 was merged.

FYI: @jkowalleck

[jkowalleck]

python markdown requires importlib_metadata which is not installed. hm, that is strange.
will look into it.

[madpah]

I can't get it to fail locally @jkowalleck ? Very weird.

[madpah]

Last successful run (https://github.com/CycloneDX/cyclonedx-python-lib/runs/4584812203?check_suite_focus=true) pulled in a newer version of Installing markdown (3.3.6) than the latest attempt: Installing markdown (3.3.5)

[madpah]

I'll regen poetry.lock @jkowalleck

[madpah]

And when doing so I get this:

<debug>PackageInfo:</debug> Invalid constraint (importlib-metadata (>='4.4') ; python_version < "3.10") found in markdown-3.3.5 dependencies, skipping

[madpah]

So - looks like the root cause is related to bumping flake8 >=4.0.1:

If we directly had markdown==3.3.6 as a dev-dependency:

poetry update                                                                                      
Updating dependencies
Resolving dependencies... (0.1s)

  SolverProblemError

  Because no versions of markdown match >3.3.6,<4.0.0
   and markdown (3.3.6) depends on importlib-metadata (>=4.4), markdown (>=3.3.6,<4.0.0) requires importlib-metadata (>=4.4).
  And because flake8 (4.0.1) depends on importlib-metadata (<4.3)
   and no versions of flake8 match >4.0.1,<5.0.0, markdown (>=3.3.6,<4.0.0) is incompatible with flake8 (>=4.0.1,<5.0.0).
  So, because cyclonedx-python-lib depends on both flake8 (^4.0.1) and markdown (^3.3.6), version solving failed.

[madpah]

Isolating dependencies for documentation generation has resolved this immediate problem.