Reify object based on base type

[AlexanderGrooff]

The currect assumption that object can be used to create a new object
is not always valid. One example is the issue I'm currently facing:

>>> reify(ast.Num(n=var('x')), {var('x'): 123})
...
     55 def _reify_object_dict(o, s):
---> 56     obj = object.__new__(type(o))
     57
     58     d = yield _reify(o.__dict__, s)

TypeError: object.__new__(Num) is not safe, use Num.__new__()

[brandonwillard]

Looks like we need to set up GitHub Actions for this repo now.

[brandonwillard]

All right, I just merged the CI changes. Rebase and the tests should register correctly. You'll need to install the new pre-commit hooks (i.e. pip install -r requirements.txt; pre-commit install), and those will likely require some new formatting changes (e.g. isort).

[AlexanderGrooff]

Hey @brandonwillard, thanks for having a look. I've rebased this PR but it doesn't look like any more linting is required.

I've added an extra commit to better reflect the changes made in the first commit.

[brandonwillard]

Looks great; thanks!