Change version to 5.8.1-SNAPSHOT

Signed-off-by: Kaloyan Raev <kaloyan.r@zend.com>
diff --git a/pom.xml b/pom.xml
index dd65407..a266481 100644
--- a/pom.xml
+++ b/pom.xml
@@ -11,7 +11,7 @@
 
 	<groupId>org.eclipse.dltk</groupId>
 	<artifactId>dltk.build.all.aggregator</artifactId>
-	<version>5.9.0-SNAPSHOT</version>
+	<version>5.8.1-SNAPSHOT</version>
 	<packaging>pom</packaging>
 	<url>https://eclipse.org/dltk</url>
 	<name>Dynamic Language Toolkit (DLTK) Aggregated build</name>