Upgrade license-maven-plugin 2.3.0 -> 2.4.0 (#991)

See:
- https://github.com/mojohaus/license-maven-plugin/releases/tag/2.4.0
- mojohaus/license-maven-plugin@2.3.0...2.4.0

pom.xml

@@ -1188,7 +1188,7 @@
                 <plugin>
                     <groupId>org.codehaus.mojo</groupId>
                     <artifactId>license-maven-plugin</artifactId>
-                    <version>2.3.0</version>
+                    <version>2.4.0</version>
                     <configuration>
                         <includedLicenses>
                             <!-- The SPDX IDs of licenses of third-party