Paramtools

- Fix deserialization bug. (109)

- Perfomance improvements to `extend` functionality. (107)
- Bug fix for `sort_values` that caused an error when calling `dump` on a `Parameters` instance that does not specify any labels. (108)

- Add the `_auto` attribute to parameter values that were extended automatically. This make it possible to update the rules for how parameters should be extended, delete the extended values, and update with the new rules (102):

python
Update extension rules:

- Make integer validation strict so that floats are now invalid. (98)
- Fixes bug where errors were not raised when passing a list value to a non-list parameter. (99)
- Fix error messages for labels. (100)

- Add `delete` method for removing a parameter's value objects. (95)
- Round out select module with the `select_lte` and `select_gte` functions. (96)
- Makes `exact_match` keyword on `Parameters.select_*` methods optional. (96)
- Fixes bug where `select_lt` was left out of top-level import. (96)

- Streamline steps to add custom types with a new [`register_custom_type`](https://paramtools.dev/api/custom-types/) function. This makes it easy to register a custom type that can be used through out the `defaults` config file. (#93)
- Add ability to select value objects based on whether a label is less than or equal to some value with the new `select_lt` function. (90)
- Update the docs website with a slick new theme from [Material for MkDocs](https://squidfunk.github.io/mkdocs-material/), add the beginnings of an API reference page using [`mkautodoc`](https://github.com/tomchristie/mkautodoc), and move the docs website to https://paramtools.dev (#94)
- Removes warnings that are shown when adjusting a value for a parameter that is not active in the current state of the `Parameters` instance. (91)