Fix tests.

ryanfox1985 · ryanfox1985 · commit b5fe0c3c4676 · 2019-06-17T23:43:33.000+02:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,4 +1,10 @@
 language: ruby
 rvm:
-  - 2.0.0
-  - 1.9.3
+  - 2.3.8
+  - 2.4.6
+  - 2.5.5
+  - 2.6.3
+  - ruby-head
+matrix:
+  allow_failures:
+    - rvm: ruby-head
