Update declare functions to have named params in metro (#55108)

Summary:
Pull Request resolved: #55108

Prepare for the future where named params are required for declare functions, aligning our behavior with TS.

Changelog: [internal]

Reviewed By: gkz

Differential Revision: D90397538

fbshipit-source-id: 4d5e6f519e02575ab895529f16e5417cfb14f85a

Author: SamChou19815

flow-typed/npm/babel-types_v7.x.x.js

@@ -3846,7 +3846,7 @@ declare module "@babel/types" {
     enter?: TraversalHandler<T>,
     exit?: TraversalHandler<T>,
   };
-  declare export function traverse<T>(n: BabelNode, TraversalHandler<T> | TraversalHandlers<T>, state?: T): void;
+  declare export function traverse<T>(n: BabelNode, handler: TraversalHandler<T> | TraversalHandlers<T>, state?: T): void;
   declare export function traverseFast<T>(n: Node, h: TraversalHandler<T>, state?: T): void;
   declare export function shallowEqual(actual: Object, expected: Object): boolean
   declare export function buildMatchMemberExpression(match: string, allowPartial?: boolean): (?BabelNode) => boolean