modelbased 0.11.2

Changes

• estimate_contrasts() for results from estimate_relation() and alike is
  now more efficient for larger number of contrasts.

• Updated information of citation(). If you want to cite the modelbased
  package, please use the JOSS publication as reference
  (https://joss.theoj.org/papers/10.21105/joss.07969).

Bug fixes

• Fixed issue with formatted labels in estimate_contrasts() for results from
  estimate_relation().