update travis ruby versions, add 2.4.0

diff --git a/.ruby-version b/.ruby-version
new file mode 100644 (file)
index 0000000..0bee604
--- /dev/null
+++ b/.ruby-version
@@ -0,0 +1 @@
+2.3.3

diff --git a/.travis.yml b/.travis.yml
index 244c188d2655bc38b1d069c56783a47cb23b8dbd..4bc9c05b4594fbd4446194968edbb4f7c9b8d42f 100644 (file)
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,4 +7,5 @@ rvm:
 - 2.0.0
 - 2.1
 - 2.2
-- 2.3.0
+- 2.3.3
+- 2.4.0