fix: shallow snapshots with decorators [no issue]

[christophehurpeau]

Context

enzymejs/enzyme#1966 a été mergée et dispo depuis les derniers plateform days

Les snapshots ont maintenant une utilitée !

Exemple:

● sections/Instructor/CommentsDrawer/Comment › No Author

- Snapshot
+ Received

- <div>
-   <ContextProvider>
-     <MockResults>
-       <JestStoryWrapper>
-         <Comment
-           comment={
-             CommentResource {
-               "author": null,
-               "comment": "Contenu du commentaire.",
-               "created_at": "2014-12-17 17:11:29",
-               "id": 4,
-               "updated_at": "2014-12-17 17:11:29",
-               Symbol(Defined Members): Array [
-                 "id",
-                 "comment",
-                 "created_at",
-                 "updated_at",
-                 "author",
-               ],
-             }
-           }
-         />
-       </JestStoryWrapper>
-     </MockResults>
-   </ContextProvider>
- </div>
+ <Comment
+   author={
+     <Text
+       strong={true}
+     >
+       MS
+     </Text>
+   }
+   avatar={<UserAvatar />}
+   className="Comment"
+   content="Contenu du commentaire."
+   datetime={
+     <FormattedDate
+       day="2-digit"
+       month="numeric"
+       value="2014-12-17 17:11:29"
+       year="numeric"
+     />
+   }
+ />

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