release: Update package.xml version to 4.4.3

Author: nim65s

package.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0"?>
 <package format="3">
   <name>dynamic-graph</name>
-  <version>4.4.2</version>
+  <version>4.4.3</version>
   <description>
     Dynamic graph library
   </description>