Merge pull request #37 from apache/dependabot/maven/ognl-ognl-3.2.21

Bump ognl from 3.2.18 to 3.2.21

pom.xml

@@ -213,7 +213,7 @@ limitations under the License.
     <dependency>
       <groupId>ognl</groupId>
       <artifactId>ognl</artifactId>
-      <version>3.2.18</version>
+      <version>3.2.21</version>
       <scope>test</scope>
     </dependency>
   </dependencies>