fixup! fixup! fixup! fixup! fixup! fixup! update flow

Author: raphamorim

packages/react-reconciler/src/ReactFiberHostContext.js

@@ -82,8 +82,8 @@ export default function<T, P, I, TI, HI, PI, C, CC, CX, PL>(
   }
 
   function pushHostContext(fiber: Fiber): void {
-    const rootInstance = requiredContext(rootInstanceStackCursor.current);
-    const context = requiredContext(contextStackCursor.current);
+    const rootInstance: C = requiredContext(rootInstanceStackCursor.current);
+    const context: CX = requiredContext(contextStackCursor.current);
     const nextContext = getChildHostContext(context, fiber.type, rootInstance);
 
     // Don't push this Fiber's context unless it's unique.

packages/react-reconciler/src/ReactFiberReconciler.js

@@ -49,7 +49,7 @@ type OpaqueRoot = FiberRoot;
 
 export type HostConfig<T, P, I, TI, HI, PI, C, CC, CX, PL> = {
   getRootHostContext(rootContainerInstance: C): CX,
-  getChildHostContext(parentHostContext: CX, type: T, instance: ?C): CX,
+  getChildHostContext(parentHostContext: CX, type: T, instance: C): CX,
   getPublicInstance(instance: I | TI): PI,
 
   createInstance(