Fix and upgrade javadoc plugin, Update JUnit5 dependency from 5.6.0 to 5.6.2

Author: Crim

CHANGELOG.md

@@ -6,6 +6,9 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 ### Features
 - [PR-46](https://github.com/salesforce/kafka-junit/pull/46) Officially added support for Kafka versions 2.5.x, 2.6.x.
 
+### Internal dependency updates
+- JUnit5 from 5.6.0 to 5.6.2
+
 ## 3.2.1 (02/03/2020)
 [PR-42](https://github.com/salesforce/kafka-junit/pull/42)
 

pom.xml

@@ -96,7 +96,7 @@
 
         <!-- JUnit versions -->
         <junit4.version>4.13</junit4.version>
-        <junit5.version>5.6.0</junit5.version>
+        <junit5.version>5.6.2</junit5.version>
         <junit5PlatformProvider.version>1.3.2</junit5PlatformProvider.version>
 
         <!-- test toggling -->
@@ -106,7 +106,7 @@
 
         <!-- plugin versions -->
         <checkstyle.version>3.1.0</checkstyle.version>
-        <javadoc.version>3.1.1</javadoc.version>
+        <javadoc.version>3.2.0</javadoc.version>
         <surefire.version>2.22.2</surefire.version>
 
         <!-- excluded tests based on specific kafka versions -->
@@ -293,6 +293,7 @@
                 <version>${javadoc.version}</version>
                 <configuration>
                     <show>public</show>
+                    <source>8</source>
                 </configuration>
             </plugin>
 
@@ -338,6 +339,9 @@
                                 <goals>
                                     <goal>jar</goal>
                                 </goals>
+				<configuration>
+				    <source>8</source>
+				</configuration>
                             </execution>
                         </executions>
                     </plugin>
@@ -373,4 +377,4 @@
             <url>https://oss.sonatype.org/content/repositories/snapshots</url>
         </snapshotRepository>
     </distributionManagement>
-</project>
+</project>