Bump spotbugs-maven-plugin from 4.7.2.2 to 4.7.3.0 (#639)

pom.xml

@@ -295,7 +295,7 @@
         <plugin>
           <groupId>com.github.spotbugs</groupId>
           <artifactId>spotbugs-maven-plugin</artifactId>
-          <version>4.7.2.2</version>
+          <version>4.7.3.0</version>
         </plugin>
         <plugin>
           <!-- not gated by Incrementals profiles, since we want the incrementalify goal to be available from the start -->