Use openjdk11 where possible in build matrix

Author: cichli

.travis.yml

@@ -37,9 +37,9 @@ jobs:
   include:
     # Test OpenJDK against latest Clojure stable
     - env: CLOJURE_VERSION=1.10 TARGET=test-clj
-      jdk: openjdk8
+      jdk: openjdk11
     - env: CLOJURE_VERSION=1.10 TARGET=test-cljs
-      jdk: openjdk8
+      jdk: openjdk11
 
     # Test Clojure master against a single JDK
     - env: CLOJURE_VERSION=master TARGET=test-clj
@@ -49,23 +49,23 @@ jobs:
 
     # Coverage analysis
     - env: CLOJURE_VERSION=1.10 TARGET=cloverage
-      jdk: oraclejdk8
+      jdk: openjdk11
       after_success: bash <(curl -s https://codecov.io/bash) -f target/coverage/codecov.json
 
     # Eastwood linter
     - stage: check
       env: CLOJURE_VERSION=1.10 TARGET=eastwood
-      jdk: oraclejdk8
+      jdk: openjdk11
 
     # Check cljfmt
     - stage: check
       env: CLOJURE_VERSION=1.10 TARGET=cljfmt
-      jdk: oraclejdk8
+      jdk: openjdk11
 
     # Deployment
     - stage: deploy
       env: TARGET=deploy
-      jdk: oraclejdk8
+      jdk: openjdk11
 
   fast_finish: true      # don't wait for allowed failures before build finish
   allow_failures: