Use Java 8 (docker-java#1249)

bsideup · KostyaSha · commit 83df4083db04 · 2019-09-26T20:11:05.000+03:00
diff --git a/pom.xml b/pom.xml
@@ -54,8 +54,8 @@
 		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
 		<jdk.debug>true</jdk.debug>
 		<jdk.optimize>false</jdk.optimize>
-		<jdk.source>1.7</jdk.source>
-		<jdk.target>1.7</jdk.target>
+		<jdk.source>1.8</jdk.source>
+		<jdk.target>1.8</jdk.target>
 
 		<jersey.version>2.27</jersey.version>
 		<jackson.version>2.9.8</jackson.version>
