fix: pom.xml to reduce vulnerabilities (#43)

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JAVA-COMGOOGLEPROTOBUF-8055227

Co-authored-by: snyk-bot <[email protected]>

Author: gertd

pom.xml

@@ -55,7 +55,7 @@
         <dependency>
             <groupId>com.aserto</groupId>
             <artifactId>java-directory</artifactId>
-            <version>0.31.2</version>
+            <version>0.31.3</version>
         </dependency>
 
         <!-- Used for unit testing -->