bump version; update news

cpsievert · cpsievert · commit 77943f0cc61d · 2016-04-06T16:33:37.000+10:00
diff --git a/DESCRIPTION b/DESCRIPTION
@@ -1,6 +1,6 @@
 Package: plotly
 Title: Create Interactive Web Graphics via 'plotly.js'
-Version: 3.4.12
+Version: 3.4.13
 Authors@R: c(person("Carson", "Sievert", role = c("aut", "cre"),
     email = "cpsievert1@gmail.com"),
     person("Chris", "Parmer", role = c("aut", "cph"),
diff --git a/NEWS b/NEWS
@@ -1,3 +1,10 @@
+3.4.13 -- 6 Apr 2016
+
+BUGFIX:
+
+In some cases, marker color was inheriting from the marker line color when
+it shouldn't have. See ##537.
+
 3.4.12 -- 5 Apr 2016
 
 CHANGES:
