Maintainer: ‘Andrzej Dudek <andrzej.dudek@ue.wroc.pl>’

No Authors@R field in DESCRIPTION.
Please add one, modifying
  Authors@R: c(person(given = "Andrzej",
                      family = "Dudek",
                      role = c("aut", "cre"),
                      email = "andrzej.dudek@ue.wroc.pl"),
               person(given = "Marcin",
                      family = "Pelka",
                      role = "aut",
                      email = "marcin.pelka@ue.wroc.pl"),
               person(given = "Justyna",
                      family = "Wilk",
                      role = "aut",
                      email = "justyna.wilk@ue.wroc.pl",
                      comment = "to 2017-09-20"),
               person(given = "Marek",
                      family = "Walesiak",
                      role = "aut",
                      email = "Marek.Walesiak@ue.wroc.pl",
                      comment = "from 2018-02-01"))
as necessary.
Maintainer: ‘Andrzej Dudek <andrzej.dudek@ue.wroc.pl>’

No Authors@R field in DESCRIPTION.
Please add one, modifying
  Authors@R: c(person(given = "Andrzej",
                      family = "Dudek",
                      role = c("aut", "cre"),
                      email = "andrzej.dudek@ue.wroc.pl"),
               person(given = "Marcin",
                      family = "Pelka",
                      role = "aut",
                      email = "marcin.pelka@ue.wroc.pl"),
               person(given = "Justyna",
                      family = "Wilk",
                      role = "aut",
                      email = "justyna.wilk@ue.wroc.pl",
                      comment = "to 2017-09-20"),
               person(given = "Marek",
                      family = "Walesiak",
                      role = "aut",
                      email = "Marek.Walesiak@ue.wroc.pl",
                      comment = "from 2018-02-01"))
as necessary.