fix: pom.xml to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JAVA-ORGAPACHECOMMONS-3043138

pom.xml

@@ -52,7 +52,7 @@
       <!-- used so that lombok can generate suppressions for spotbugs. It needs to find it on the relevant classpath -->
       <groupId>com.github.spotbugs</groupId>
       <artifactId>spotbugs</artifactId>
-      <version>4.7.2</version>
+      <version>4.7.3</version>
       <scope>compile</scope>
     </dependency>
 
@@ -432,7 +432,7 @@
           <dependency>
             <groupId>com.github.spotbugs</groupId>
             <artifactId>spotbugs</artifactId>
-            <version>4.7.2</version>
+            <version>4.7.3</version>
           </dependency>
         </dependencies>
         <executions>
@@ -484,7 +484,7 @@
       <id>integration-test</id>
       <properties>
         <!-- run the integration tests by clearing the exclusions -->
-        <testExclusions></testExclusions>
+        <testExclusions/>
       </properties>  
       <build>
         <plugins>