update requirements

Author: machow

requirements.txt

@@ -69,7 +69,7 @@ scipy==1.2.0
 Send2Trash==1.5.0
 simplegeneric==0.8.1
 singledispatch==3.4.0.3
-siuba==0.0.3
+siuba==0.0.6
 six==1.12.0
 statsmodels==0.9.0
 terminado==0.8.1