update version

R-package/DESCRIPTION

@@ -1,8 +1,8 @@
 Package: lightgbm
 Type: Package
 Title: Light Gradient Boosting Machine
-Version: 2.1.1
-Date: 2018-04-29
+Version: 2.1.2
+Date: 2018-06-22
 Authors@R: c(
 	person("Guolin", "Ke", email = "guolin.ke@microsoft.com", role = c("aut", "cre")),
 	person("Damien", "Soukhavong", email = "damien.soukhavong@skema.edu", role = c("ctb")),

VERSION.txt

@@ -1 +1 @@
-2.1.1
+2.1.2