v1.3.8

• Add Prosperity Gap to both svy and lnp years.

• Implement nowcast up to 2024

• Add estimate_type variable to pip() and pip_grp*() calls

• Add new aux file, metaregion

• Change algorithms for MRV calls to return up to lineup year.

• Modify unit tests to account for the changes above.

• Fix distribution_type variables for both svy and lnp years.

• improve algorithm of add_*() functions

• Fix aggregation of medians

• Update empty responses.

• add end point wld-lineup-year to return nowcast year and tooltip text