Use com.github.cbioportal.maven-external-version

Was using inodb's version before. This uses the cBioPortal org's fork instead.
The difference with the main fork, is that this version allows one to include
the plugin through jitpack, see:

cBioPortal/maven-external-version@67e9fc4

pom.xml

@@ -44,9 +44,9 @@
     <build>
     <plugins>
           <plugin>
-            <groupId>com.github.inodb.maven-external-version</groupId>
+            <groupId>com.github.cbioportal.maven-external-version</groupId>
             <artifactId>maven-external-version-plugin</artifactId>
-            <version>b7bc6a6ff7d51295089d5dc7ff64084063440cc6</version>
+            <version>67e9fc4ebb17333b119ab10e1b521fe8391b7ff2</version>
             <extensions>true</extensions>
             <configuration>
               <strategy hint="script">