OPPPY-0_1_13 release

[clevelam]

• Modernize to .toml file
• Use TempoaryDirectory to prevent clutter during testing
• Fix multiple arrival times plotting
• Update version number and change log to opppy-0_1_13

[clevelam]

@tylerjereddy do you want to take a look at this for me? I had a hard time figuring out how to use tmp_path so I opted to use TempoaryDirectory, do you think this is an alright solution?

[tylerjereddy]

I made a small suggestion about constructing the output paths a bit more robustly, but I did confirm that this branch avoids polluting the user directory when running the testsuite.

I do have other things to say of course, like it would be great to avoid the os.system() testing business for a plethora of reasons, and probably switching away from unittest.TestCase to conventional pytest tests so we could more easily use fixtures. But that's a larger endeavor, and this is at least a little cleaner than before.

[clevelam]

I made a small suggestion about constructing the output paths a bit more robustly, but I did confirm that this branch avoids polluting the user directory when running the testsuite.

I do have other things to say of course, like it would be great to avoid the os.system() testing business for a plethora of reasons, and probably switching away from unittest.TestCase to conventional pytest tests so we could more easily use fixtures. But that's a larger endeavor, and this is at least a little cleaner than before.

Yeah, I don't particularly care for the os.system calls either. I chose this because it was the only way I could think of to emulate the interactive nature of the parser (as used on the command line by users).