Bump GDL version to 0.3.9

Co-authored-by: Martin Junghanns <martin.junghanns@neotechnology.com>

Author: yuvalr1neo

gradle/dependencies.gradle

@@ -74,7 +74,7 @@ ext {
         'eclipse-collections'  : '11.1.0',
         'ejml'                 : '0.43.1',
         'fastcsv'              : '2.2.2',
-        'gdl'                  : '0.3.8',
+        'gdl'                  : '0.3.9',
         'hamcrest'             : '2.2',
         'HdrHistogram'         : '2.1.12',
         'hppc'                 : '0.7.3',