Travis: specify R version

alandipert · alandipert · commit 79ca0d179557 · 2019-01-08T13:00:14.000-08:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,7 +1,9 @@
 matrix:
   include:
     # R for travis: see documentation at https://docs.travis-ci.com/user/languages/r
-    - language: R
+    - language: r
+      r:
+        - release
       sudo: required
       cache: packages
       before_install:
