Travisci Java 11 check (#19)

* add TravisCI integration

* add build.gradle

* remove java 11 check from travis

* add java11 check to travis

* add java 11 to travis

* remove .iml file

Author: fuchsnj

.travis.yml

@@ -1,3 +1,4 @@
 language: java
 jdk:
-- oraclejdk8
+- oraclejdk8
+- oraclejdk11

gradle/wrapper/gradle-wrapper.properties

@@ -2,4 +2,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.4-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.10.2-bin.zip