MAINT bump required liac-arff version (#427)

mfeurer · web-flow · commit fb20762aa2c9 · 2018-03-29T17:35:11.000+02:00
* MAINT bump required liac-arff version

* Update requirements.txt
diff --git a/requirements.txt b/requirements.txt
@@ -1,7 +1,7 @@
 mock
 numpy>=1.6.2
 scipy>=0.13.3
-liac-arff>=2.1.1
+liac-arff>=2.2.1
 xmltodict
 nose
 requests
