Statprocon

- Public release
- Raise exception if less than 2 counts are provided

- Add `x_exponential_moving_average()` method to return exponential moving averages
- Add optional `include_exponential_moving_averages` flag to `to_dict()` to allow including the values in the returned dict
- Add support for Python 3.12
- Drop support for end of life Python 3.7

- Add `x_plot()` and `mr_plot()` methods to plot more detailed charts using `pandas` and `matplotlib` that highlight any data points that meet the detection rules

- Switch `limit_floor` parameter to constructor rather than passing through different methods

- Add helper method `is_lnpl_above_floor()` to check if the Lower Natural Process Limit has any value that is above the specified floor argument. This can be used to check if LNPL should be used or not
- Add optional parameter `lower_natural_process_limit_floor` to `x_to_dict()` method. If the LNPL is not above this value, it will not be included in the result
- Remove optional `floor` parameter from `lower_natural_process_limit()`. The helper method can be used to check if this condition occurs

- Rename `moving_average()` to `x_moving_average()`