contactdata 1.0.0

New features

The updated data from Prem et al. (2021) has been added (#4). This results in a
large number of cascading changes, including some breaking changes, detailed
below.

Breaking changes

• The new default returns data from the updated dataset. This means that any
  re-run of code written with previous versions of contactdata will return a
  different result
• Arguments in contact_df_countries() have been removed and replaced by ...
  to increase flexibility. This is only an interface change and does not modify
  the behaviour since all arguments were already forwarded to contact_matrix().

Non-breaking changes

• list_countries() and contact_matrix() now have two additional arguments:
  • geographic_setting, which specifies if you'd like to get the contact data
    from a "rural", "urban" setting, or from "all" settings.
  • data_source, which indicates if the data should be extracted from Prem et
    al. (2017) or Prem et al. (2021)