update version of scrooge-maven-plugin to avoid NPE in mvn eclipse:eclip...

...se

Exception:
Caused by: org.apache.maven.plugin.PluginExecutionException: Execution thrift-sources of goal com.twitter:scrooge-maven-plugin:3.9.0:compile failed.
	at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:115)
	at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:208)
	... 23 more
Caused by: java.lang.NullPointerException
	at com.twitter.AbstractMavenScroogeMojo.findThriftDependencies(AbstractMavenScroogeMojo.java:324)
	at com.twitter.AbstractMavenScroogeMojo.findThriftFiles(AbstractMavenScroogeMojo.java:292)
	at com.twitter.AbstractMavenScroogeMojo.execute(AbstractMavenScroogeMojo.java:191)
	at com.twitter.MavenScroogeCompileMojo.execute(MavenScroogeCompileMojo.java:22)
	at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:106)