Travis: Replace Java 14 with 15. One Java 11
build.
diff --git a/.travis.yml b/.travis.yml
index f237a1a..4218f02 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -22,8 +22,7 @@
 jdk:

   - openjdk8

   - openjdk11

-  - oraclejdk11

-  - openjdk14

+  - openjdk15

   - openjdk-ea

 

 matrix: