changed to correct dygraph snapshot version

Author: timeu

pom.xml

@@ -48,7 +48,7 @@
     <dependency>
     	<groupId>org.danvk</groupId>
     	<artifactId>dygraphs-gwt</artifactId>
-    	<version>0.7.3-SNAPSHOT</version>
+    	<version>0.7.4-SNAPSHOT</version>
     </dependency>
     <dependency>
     	<groupId>at.gmi.nordborglab</groupId>