Drop Oracle JDK 8, add OpenJDK 13.

Gary Gregory · Gary Gregory · commit 3b9a0a2616fc · 2019-08-14T13:23:11.000-07:00
diff --git a/.travis.yml b/.travis.yml
@@ -22,13 +22,12 @@ matrix:
       jdk: openjdk8
 
 jdk:
-  - oraclejdk8
-  - oraclejdk9
   - oraclejdk11
   - openjdk8
   - openjdk10
   - openjdk11
   - openjdk12
+  - openjdk13
   - openjdk-ea  
 
 script:
