Bump to 0.3.1

Author: lionel-

DESCRIPTION

@@ -1,6 +1,6 @@
 Package: vdiffr
 Title: Visual Regression Testing and Graphical Diffing
-Version: 0.3.0.9000
+Version: 0.3.1
 Authors@R: c(
     person("Lionel", "Henry", , "[email protected]", c("cre", "aut")),
     person("RStudio", role = "cph"),

NEWS.md

@@ -1,13 +1,17 @@
 
-# vdiffr 0.3.0.9000
+# vdiffr 0.3.1
+
+This release makes vdiffr compatible with ggplot2 3.2.0. It also
+features two contributions from the Tidyverse developer day in Austin:
 
 - You can now select the validated cases in the Shiny app (#38,
   @nathancday).
 
 - The testthat context is now shown on the Shiny app (#14,
   @paleolimbot).
 
-- Fix warnings in non-UTF-8 MBCS locale (#59, @yutannihilation).
+Finally, it fixes warnings in non-UTF-8 MBCS locale (#59,
+@yutannihilation).
 
 
 # vdiffr 0.3.0