Try testing on Java 11 on Travis

tomwhite · tomwhite · commit 3f67bff00f2a · 2019-09-02T12:18:17.000+01:00
diff --git a/.travis.yml b/.travis.yml
@@ -6,7 +6,7 @@ git:
   depth: 9999999
   lfs_skip_smudge: true
 jdk:
-- openjdk8
+- openjdk11
 env:
   matrix:
   - TEST_TYPE=cloud UPLOAD=true TESTS_REQUIRE_GCLOUD=true
