This change declares the type of `p` to accept either the list of mapping return type.

Means we don't lose the information about whether the param `odds` is a mapping or other collection, and therefore we don't need to early capture `keys`.

Also, `_class` was unused, so removed, however we probably can support returning the same type of mapping as the user inputs.

This allows us to use the nicer union syntax, `A | B`.

Sequences have specific order, important as the output list is ordered the same as the input sequence.

…ities`

Makes all arguments other than `odds` kw only, this drastically reduces the number of required overloads to type the signature properly.

```py
# still works
calculate_implied_probabilities([2.0, 2.0])
calculate_implied_probabilities(odds=[2.0, 2.0])
calculate_implied_probabilities([2.0, 2.0], full_output=True)
## also any other combination of passing arguments as keyword args remains the same

# patterns of passing any arg other than `odds` as positional breaks
calculate_implied_probabilibies([2.0, 2.0], 1000)
calculate_impolied_probabilities([2.0, 2.0], 1000, 1e-12, True)
```

This encourages clarity at the callsite and also helps from a library perspective as it is easier to add new kw only args to an api without breaking downstream.

Adds overloads and tests for combination of input types and value of `full_output` flag.

Allows the key type of returned dict to match the input key type.

Previously, and input of `{"home": 2.0, "away": 2.0}` would return type `dict[Any, float]`. This change allows that to return `dict[str, float]`.

Instead of returning a dict that loses the type of the implied probabilities, we can return an object that is generic on the implied probability return type.

This means that as far as mypy is concerned, the following two are equivalent:

```py
calculate_implied_probabilities([2.0, 2.0])
calculate_implied_probabilities([2.0, 2.0], full_output=True).implied_probabilities
```

Configures mypy to run on tests as well as library code.

Refactors tests to deal with type errors caused by reused variable names inside the mono-test.

Reflects changes introduced in #5.

Closes #7

Bumps [black](https://github.com/psf/black) from 23.10.1 to 24.3.0.
- [Release notes](https://github.com/psf/black/releases)
- [Changelog](https://github.com/psf/black/blob/main/CHANGES.md)
- [Commits](psf/black@23.10.1...24.3.0)

---
updated-dependencies:
- dependency-name: black
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>