Merge remote-tracking branch 'upstream/master'

* upstream/master:
  bump x.y.z versions to odd y after creation of RELEASE_3_7 branch
  bump x.y.z versions to even y prior to creation of RELEASE_3_7 branch

DESCRIPTION

 Package: splatter
 Type: Package
 Title: Simple Simulation of Single-cell RNA Sequencing Data
-Version: 1.3.6
+Version: 1.5.0
 Date: 2018-04-30
 Author: Luke Zappia
 Authors@R: