Bump maven-javadoc-plugin to 3.6.0 (#5178)
New version plugin could find javadoc without setting $JAVA_HOME
diff --git a/pom.xml b/pom.xml
index 9534b94..d89208e 100644
--- a/pom.xml
+++ b/pom.xml
@@ -88,7 +88,7 @@
         <maven-gpg-plugin.version>1.6</maven-gpg-plugin.version>
         <maven-source-plugin.version>3.0.1</maven-source-plugin.version>
         <maven-surefire-plugin.version>3.0.0-M4</maven-surefire-plugin.version>
-        <maven-javadoc-plugin.version>3.0.1</maven-javadoc-plugin.version>
+        <maven-javadoc-plugin.version>3.6.0</maven-javadoc-plugin.version>
         <maven-compiler-plugin.version>3.7.0</maven-compiler-plugin.version>
         <maven-resources-plugin.version>3.2.0</maven-resources-plugin.version>
         <maven-release-plugin.version>2.5.3</maven-release-plugin.version>
@@ -690,6 +690,7 @@
                 <artifactId>maven-javadoc-plugin</artifactId>
                 <version>${maven-javadoc-plugin.version}</version>
                 <configuration>
+                    <source>${java.version}</source>
                     <sourcepath>src/main/java</sourcepath>
                     <detectJavaApiLink>false</detectJavaApiLink>
                     <detectOfflineLinks>false</detectOfflineLinks>