Update files from the datasets library (from 1.6.0)

Release notes: https://github.com/huggingface/datasets/releases/tag/1.6.0

README.md

@@ -19,7 +19,7 @@ size_categories:
   facqa:
   - 1K<n<10K
   hoasa:
-  - n<1K
+  - 1K<n<10K
   keps:
   - 1K<n<10K
   nergrit:

indonlu.py

@@ -14,14 +14,11 @@
 # limitations under the License.
 """The IndoNLU benchmark is a collection of resources for training, evaluating, and analyzing natural language understanding systems for Bahasa Indonesia"""
 
-from __future__ import absolute_import, division, print_function
 
 import ast
 import csv
 import textwrap
 
-import six
-
 import datasets
 
 
@@ -535,12 +532,10 @@ class Indonlu(datasets.GeneratorBasedBuilder):
         if self.config.name in (sentence_features + ner_ + pos_):
             features = {
                 text_feature: datasets.Sequence(datasets.Value("string"))
-                for text_feature in six.iterkeys(self.config.text_features)
+                for text_feature in self.config.text_features.keys()
             }
         else:
-            features = {
-                text_feature: datasets.Value("string") for text_feature in six.iterkeys(self.config.text_features)
-            }
+            features = {text_feature: datasets.Value("string") for text_feature in self.config.text_features}
 
         if self.config.label_classes:
             if self.config.name in sentence_features: