upgrade jdk versions in travis config

.travis.yml

@@ -3,15 +3,12 @@ language: java
 services:
   - redis-server
 
-matrix:
-  include:
-    - jdk: oraclejdk8
-    - jdk: openjdk7
-      sudo: required
-      before_install: # Work around missing crypto in openjdk7
-        - sudo wget "https://bouncycastle.org/download/bcprov-ext-jdk15on-158.jar" -O "${JAVA_HOME}/jre/lib/ext/bcprov-ext-jdk15on-158.jar"
-        - sudo perl -pi.bak -e 's/^(security\.provider\.)([0-9]+)/$1.($2+1)/ge' /etc/java-7-openjdk/security/java.security
-        - echo "security.provider.1=org.bouncycastle.jce.provider.BouncyCastleProvider" | sudo tee -a /etc/java-7-openjdk/security/java.security
+jdk:
+  - openjdk7
+  - openjdk8
+  - openjdk9
+  - openjdk10
+  - openjdk11
 
 before_cache:
   - rm -f  $HOME/.gradle/caches/modules-2/modules-2.lock

build.gradle

@@ -6,7 +6,7 @@ plugins {
     id 'maven-publish'
     id 'signing'
     id 'jacoco'
-    id 'com.github.kt3k.coveralls' version '2.8.2'
+    id 'com.github.kt3k.coveralls' version '2.8.4'
 }
 
 def publish_username = project.hasProperty("ossrhUsername") ? project.ossrhUsername : ''