Changes in version 1.0.0                        

  - Initial CRAN release hopefully.
  - Formula interface for specifying constraints: rr_exact(), rr_l2(),
    rr_kl(), rr_mean(), rr_var(), rr_quantile(), rr_range(),
    rr_between().
  - ADMM solver following Barratt et al. (2021).
  - Six population data formats supported.