bump x.y.z version to odd y after creation of RELEASE_3_10 branch

DESCRIPTION

 Package: splatter
 Type: Package
 Title: Simple Simulation of Single-cell RNA Sequencing Data
-Version: 1.10.0
+Version: 1.11.0
 Date: 2019-10-20
 Authors@R:
     c(person("Luke", "Zappia", role = c("aut", "cre"),