Added TOML Support

[aleexharris]

New Language Definition Contribution

Description

Language Name: TOML

Tests based quite heavily on the YAML tests.

Checklist for Adding a New Language

• I have added the language to syntax.json with the language name matching that in GitHub's Linguist languages.yml file.
• I have added sample code to test_new.diff and test_closed.diff.
• I have added issue creation and closure tests to test_todo_parser.py. The tests should check that the ace_mode of the issue matches that specified in the languages.yml file. If existing checks for that ace_mode exists, I have incremented them instead.
• I have updated README.md to add the language.
• I have run and verified all tests.

NOTE: I couldn't get the test suite to run for me (even the clean fork) and I tried a couple different versions of Python. Maybe worth adding to the documentation more detail around this.

[alstr]

Thanks for the submission.

All the tests run fine here. You should just need to do:

python -m pip install --upgrade pip
# Make sure pytest is installed
pip install -r requirements.txt
python -m unittest