Replace YAML keys from int to str (#1)

- Replace YAML keys from int to str (f672e6c4c643a1fe911f19137d6e556f2a8a0042)

README.md

@@ -43,16 +43,16 @@ dataset_info:
     sequence:
       class_label:
         names:
-          0: y
-          1: n
-          2: m
+          '0': y
+          '1': n
+          '2': m
   - name: yesnos
     sequence:
       class_label:
         names:
-          0: y
-          1: n
-          2: x
+          '0': y
+          '1': n
+          '2': x
   - name: answers
     sequence:
     - name: texts