Merge pull request #1100 from creeper123123321/master

Make Travis test compiling with Java 11

.travis.yml

@@ -1,7 +1,9 @@
 sudo: false
 
 language: java
-jdk: oraclejdk8
+jdk: 
+  - oraclejdk8
+  - openjdk11
 
 cache:
   directories:

pom.xml

@@ -63,7 +63,7 @@
         <dependency>
             <groupId>org.projectlombok</groupId>
             <artifactId>lombok</artifactId>
-            <version>1.16.20</version>
+            <version>1.18.4</version>
             <scope>provided</scope>
         </dependency>