fix Travis-CI (use openjdk8)

SethTisue · SethTisue · commit 11b76e3fd103 · 2019-09-07T08:15:53.000-05:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,7 +1,7 @@
 language: scala
 
 jdk:
-  - oraclejdk8
+  - openjdk8
 
 script:
   - sbt test
