Update plugins/deps in pom for spark example
diff --git a/spark/pom.xml b/spark/pom.xml
index af3522f..48a7c33 100644
--- a/spark/pom.xml
+++ b/spark/pom.xml
@@ -20,7 +20,8 @@
   <parent>
     <groupId>org.apache</groupId>
     <artifactId>apache</artifactId>
-    <version>21</version>
+    <version>23</version>
+    <relativePath />
   </parent>
   <groupId>org.apache.accumulo</groupId>
   <artifactId>accumulo-spark</artifactId>
@@ -30,7 +31,8 @@
   <properties>
     <accumulo.version>2.0.0</accumulo.version>
     <eclipseFormatterStyle>contrib/Eclipse-Accumulo-Codestyle.xml</eclipseFormatterStyle>
-    <hadoop.version>3.2.0</hadoop.version>
+    <hadoop.version>3.2.1</hadoop.version>
+    <maven.compiler.release>8</maven.compiler.release>
     <maven.compiler.source>1.8</maven.compiler.source>
     <maven.compiler.target>1.8</maven.compiler.target>
     <zookeeper.version>3.4.14</zookeeper.version>
@@ -63,7 +65,7 @@
     <dependency>
       <groupId>org.apache.spark</groupId>
       <artifactId>spark-core_2.11</artifactId>
-      <version>2.4.3</version>
+      <version>2.4.5</version>
     </dependency>
   </dependencies>
   <build>
@@ -117,7 +119,7 @@
                   <version>[3.5.0,)</version>
                 </requireMavenVersion>
                 <requireJavaVersion>
-                  <version>[${maven.compiler.target},)</version>
+                  <version>[11,)</version>
                 </requireJavaVersion>
               </rules>
             </configuration>
@@ -136,7 +138,7 @@
           <dependency>
             <groupId>com.puppycrawl.tools</groupId>
             <artifactId>checkstyle</artifactId>
-            <version>8.23</version>
+            <version>8.29</version>
           </dependency>
         </dependencies>
         <executions>