feat: pass through json serialization options

[uniqueg]

Pass through arbitrary keyword arguments to json.dumps() in the Base.as_json() method.

Among other things, this can be used to "pretty print" a model (see #21), like so:

import tes

task = tes.Task(
    executors=[
        tes.Executor(
            image="alpine",
            command=["echo", "hello"]
        )
    ]
)

print(task.as_json(indent=3))

Output:

{
   "executors": [
      {
         "image": "alpine",
         "command": [
            "echo",
            "hello"
         ]
      }
   ]
}

Resolves #21

[kellrott]

I think this is producing a new unit test error. But I don't see how it's connected to the PR. Is it because the test is running in python 3.10 and a new error occurred?

[uniqueg]

Yes, looks like. I could try to fix this, but it will be hard to make this work for the wide range of versions specified in setup.py (2.7, 3.4, 3.5 and 3.6) and including 3.7 through to 3.10.

Actually, all of the currently supported versions have been deprecated/unsupported for more than a year:

Personally, I think that whoever uses py-tes and was happy with it up until now (not many people asking for updates, features etc.) can likely go on using py-tes up to 0.4.2, and I think we can safely break backwards compatibility from at least 3.5 and backwards (better 3.6).

I could:

• Update dependency ranges to satisfy recent Python 3.7 through 3.10 patch versions
• Update the code, where necessary
• Update the GH Actions workflow to run tests with all these versions

What do you think @kellrott?

[kellrott]

It's probably worth the time to get it back in sync with the current Python release. And you are right, if someone needs an older version of Python, the 0.4.2 release of py-tes seems to have worked find so far.

[uniqueg]

Cool, I'll do that then.

[uniqueg]

Added to #44. Closing this PR