Align label mapping with imdb dataset (#1)

- Align label mapping with imdb dataset (930d26cd462b0e513eb7ed8e5f3b992437ab2917)


Co-authored-by: Lewis Tunstall <lewtun@users.noreply.huggingface.co>

config.json

@@ -18,5 +18,13 @@
   "seq_classif_dropout": 0.2,
   "sinusoidal_pos_embds": false,
   "tie_weights_": true,
-  "vocab_size": 30522
-}
+  "vocab_size": 30522,
+  "label2id": {
+    "neg": 0,
+    "pos": 1
+  },
+  "id2label": {
+    "0": "neg",
+    "1": "pos"
+  }
+}