Travis: Replace Java 14 with 15.

garydgregory · garydgregory · commit 6eb7d3469027 · 2020-11-20T21:27:37.000-05:00
diff --git a/.travis.yml b/.travis.yml
@@ -18,7 +18,7 @@ language: java
 jdk:
   - openjdk8
   - openjdk11
-  - openjdk14  
+  - openjdk15
   - openjdk-ea
 
 script:
