Update Jest to 21.3.0-beta.8

Reviewed By: davidaurelio

Differential Revision: D6221784

fbshipit-source-id: 189e895378635dd21d14d6fb1f93510a52c90742

Libraries/Lists/__tests__/__snapshots__/FlatList-test.js.snap

@@ -38,13 +38,13 @@ exports[`FlatList renders all the bells and whistles 1`] = `
   onEndReachedThreshold={2}
   onLayout={[Function]}
   onMomentumScrollEnd={[Function]}
-  onRefresh={[Function]}
+  onRefresh={[MockFunction]}
   onScroll={[Function]}
   onScrollBeginDrag={[Function]}
   onScrollEndDrag={[Function]}
   refreshControl={
     <RefreshControlMock
-      onRefresh={[Function]}
+      onRefresh={[MockFunction]}
       progressViewOffset={undefined}
       refreshing={false}
     />

Libraries/Lists/__tests__/__snapshots__/SectionList-test.js.snap

@@ -278,14 +278,14 @@ exports[`SectionList renders all the bells and whistles 1`] = `
   onEndReachedThreshold={2}
   onLayout={[Function]}
   onMomentumScrollEnd={[Function]}
-  onRefresh={[Function]}
+  onRefresh={[MockFunction]}
   onScroll={[Function]}
   onScrollBeginDrag={[Function]}
   onScrollEndDrag={[Function]}
   onViewableItemsChanged={undefined}
   refreshControl={
     <RefreshControlMock
-      onRefresh={[Function]}
+      onRefresh={[MockFunction]}
       progressViewOffset={undefined}
       refreshing={false}
     />

Libraries/Lists/__tests__/__snapshots__/VirtualizedList-test.js.snap

@@ -441,13 +441,13 @@ exports[`VirtualizedList renders all the bells and whistles 1`] = `
   onEndReachedThreshold={2}
   onLayout={[Function]}
   onMomentumScrollEnd={[Function]}
-  onRefresh={[Function]}
+  onRefresh={[MockFunction]}
   onScroll={[Function]}
   onScrollBeginDrag={[Function]}
   onScrollEndDrag={[Function]}
   refreshControl={
     <RefreshControlMock
-      onRefresh={[Function]}
+      onRefresh={[MockFunction]}
       progressViewOffset={undefined}
       refreshing={false}
     />

package.json

@@ -209,11 +209,11 @@
     "eslint-plugin-prettier": "2.1.1",
     "eslint-plugin-react": "^7.2.1",
     "flow-bin": "^0.58.0",
-    "jest": "^21",
+    "jest": "21.3.0-beta.8",
     "prettier": "1.7.0",
     "react": "16.0.0",
     "react-test-renderer": "16.0.0",
     "shelljs": "^0.7.8",
     "sinon": "^2.2.0"
   }
-}
+}