Use sisu 0.3.4

Version 0.0.0.M2a sounds too risky for releases.

Change-Id: Ia90296a94427070603ea42909cd2d62f2085ee32
Signed-off-by: Alexander Kurtakov <akurtako@redhat.com>
diff --git a/m2e-maven-runtime/org.eclipse.m2e.maven.indexer/pom.xml b/m2e-maven-runtime/org.eclipse.m2e.maven.indexer/pom.xml
index c269d5c..6c34e73 100644
--- a/m2e-maven-runtime/org.eclipse.m2e.maven.indexer/pom.xml
+++ b/m2e-maven-runtime/org.eclipse.m2e.maven.indexer/pom.xml
@@ -47,7 +47,7 @@
     <dependency>
       <groupId>org.eclipse.sisu</groupId>
       <artifactId>org.eclipse.sisu.plexus</artifactId>
-      <version>0.0.0.M2a</version>
+      <version>0.3.4</version>
       <scope>provided</scope>
     </dependency>
   </dependencies>