Update pmml4s to 1.5.4

Author: scorebot

pypmml/jars/pmml4s_2.13-1.5.2.jar renamed to pypmml/jars/pmml4s_2.13-1.5.4.jar

@@ -18,4 +18,4 @@
 
 # Dev branch marker is: 'X.Y.dev' or 'X.Y.devN' where N is an integer.
 # 'X.Y.dev0' is the canonical version of 'X.Y.dev'
-__version__ = '1.5.3'
+__version__ = '1.5.4'