Changes in version 2.7.1                        

  - mgeneSim and mclusterSim now always return matrix (2018-08-08, Wed)
      - https://www.biostars.org/p/330642/#331598

                        Changes in version 2.5.1                        

  - return NA for deprecated IDs (2018-01-09, Fri)
      - https://support.bioconductor.org/p/105822/#105840