Changes in version 0.0.3 (2022-10-20)                  

  - Fix rlang warning. (#1, thanks @mvuorre)
    
      - poly_add_columns() gains an na_values argument for how to handle
        missing values. Default is "error" to raise an error. Other
        options include "warn" to ignore the missing values but raise a
        warning and "allow" to silently accept the missing values. (#2)

                 Changes in version 0.0.2 (2017-05-27)                  

  - Initial CRAN release.