Drop Oracle JDK 8, add OpenJDK 13.
diff --git a/.travis.yml b/.travis.yml
index 4608ae3..de7abaa 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -20,11 +20,11 @@
     - os: linux-ppc64le

       jdk: openjdk8

 jdk:

-  - oraclejdk8

   - oraclejdk11

   - openjdk8

   - openjdk11

   - openjdk12

+  - openjdk13

   - openjdk-ea

 

 after_success: