bump language level to Java 11

.drone.yml

@@ -1,16 +1,5 @@
 kind: pipeline
 type: docker
-name: java8
-
-steps:
-  - name: test
-    image: maven:3-jdk-8-alpine
-    commands:
-      - mvn clean test
-
----
-kind: pipeline
-type: docker
 name: java11
 
 steps:

.travis.yml

@@ -1,6 +1,5 @@
 language: java
 jdk:
-  - openjdk8
   - openjdk11
   - openjdk14
 install: true

CHANGELOG.md

@@ -1,6 +1,11 @@
 # Changelog
 All notable changes to this project will be documented in this file.
 
+## unreleased
+### Breaking
+* Java 11 or later required
+
+
 ## 1.3.0 - 2019-12-04
 ### Security
 * Updated dependencies

pom.xml

@@ -1,11 +1,12 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
 
     <groupId>de.stklcode.pubtrans</groupId>
     <artifactId>juraclient</artifactId>
-    <version>1.3.1-SNAPSHOT</version>
+    <version>2.0.0-SNAPSHOT</version>
 
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
@@ -88,8 +89,7 @@
                 <artifactId>maven-compiler-plugin</artifactId>
                 <version>3.8.1</version>
                 <configuration>
-                    <source>1.8</source>
-                    <target>1.8</target>
+                    <release>11</release>
                 </configuration>
             </plugin>
             <plugin>