Test import insertion for type annotations

python/testData/intentions/PyAnnotateTypesIntentionTest/importDict.py

@@ -0,0 +1,2 @@
+def get_dict<caret>():
+    return {1: '1'}

python/testData/intentions/PyAnnotateTypesIntentionTest/importDict_after.py

@@ -0,0 +1,4 @@
+from typing import Dict
+
+def get_dict() -> Dict[int, str]:
+    return {1: '1'}