Jsonjsc

- Convert to `pyproject.toml` (PEP 621)
- Add support for Python 3.7, 3.8, 3.9, 3.10, 3.11
- Drop support for Python 2.7, 3.5 and 3.6
- Use hatchling and Hatch

Fixes bug in Issue 2

Block comments that looked like this:


{
/* No leading characters or trailing characters after closing block */
}


... caused the parser to wrap around and check see the leading and trailing forward slash as a single line comment and not parse out the block comment.

Make the one little change to make the library 2.7 compatible.

This is the initial release for pypi.