javadoc needs OpenJDK 8 too as it is xenial

Vladimir Kotal · Vladimir Kotal · commit 20ba96d84edb · 2019-06-17T15:20:53.000+02:00
diff --git a/.travis.yml b/.travis.yml
@@ -84,6 +84,6 @@ jobs:
     name: Upload javadocs to Github pages
     os: linux
     dist: xenial
-    jdk: oraclejdk8
+    jdk: openjdk8
     script: dev/javadoc.sh
     install: true
