* fixed #297 try out java15

thomaswoehlke · thomaswoehlke · commit 8c1b11de3a03 · 2020-10-08T15:47:03.000+02:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,6 +1,6 @@
 dist: bionic
 language: java
-jdk: openjdk13
+jdk: openjdk15
 services:
   - docker
 env:
