use JDK 11 for building

Author: overheadhunter

.mvn/maven.config

@@ -1 +1 @@
--DcommonConfig.compiler.profile=jdk7_w_errorprone
+-DcommonConfig.compiler.profile=jdk11_w_errorprone

.travis.yml

@@ -4,7 +4,7 @@
 language: java
 install: true
 jdk:
-  - openjdk8
+  - openjdk11
 
 env:
   global:

pom.xml

@@ -7,7 +7,7 @@
     <parent>
         <groupId>at.favre.lib</groupId>
         <artifactId>common-parent</artifactId>
-        <version>12</version>
+        <version>15</version>
     </parent>
 
     <artifactId>hkdf</artifactId>
@@ -39,6 +39,9 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
+                <configuration>
+					<release>7</release>
+				</configuration>
             </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
@@ -47,6 +50,9 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-javadoc-plugin</artifactId>
+                <configuration>
+					<release>7</release>
+				</configuration>
             </plugin>
             <plugin>
                 <groupId>org.owasp</groupId>