Add evaluation results on the squad_v2 config and validation split of squad_v2

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Your model has been evaluated on the squad_v2 config and validation split of the [squad_v2](https://huggingface.co/datasets/squad_v2) dataset by

@tvdermeer

, using the predictions stored [here](https://huggingface.co/datasets/autoevaluate/autoeval-eval-squad_v2-squad_v2-552ce2-1507654811).\
Accept this pull request to see the results displayed on the [Hub leaderboard](https://huggingface.co/spaces/autoevaluate/leaderboards?dataset=squad_v2).\
Evaluate your model on more datasets [here](https://huggingface.co/spaces/autoevaluate/model-evaluator?dataset=squad_v2).

README.md

@@ -7,6 +7,26 @@ pipeline_tag: question-answering
 tags:
 - roberta
 - question-answering
+model-index:
+- name: navteca/roberta-large-squad2
+  results:
+  - task:
+      type: question-answering
+      name: Question Answering
+    dataset:
+      name: squad_v2
+      type: squad_v2
+      config: squad_v2
+      split: validation
+    metrics:
+    - name: Exact Match
+      type: exact_match
+      value: 85.2545
+      verified: true
+    - name: F1
+      type: f1
+      value: 88.4396
+      verified: true
 ---
 # Roberta large model for QA (SQuAD 2.0)