fix: fix useDeno hook (#127)

Author: ije

framework/react/hooks.ts

@@ -44,8 +44,8 @@ export function withRouter<P>(Component: ComponentType<P>) {
  *
  * ```tsx
  * export default function App() {
- *   const version = useDeno(() => Deno.version)
- *   return <p>{version.deno}</p>
+ *   const version = useDeno(() => Deno.version.deno)
+ *   return <p>{version}</p>
  * }
  * ```
  *
@@ -56,7 +56,7 @@ export function useDeno<T = any>(callback: () => (T | Promise<T>), revalidate?:
   const id = arguments[2] // generated by compiler
   const { pathname } = useRouter()
   return useMemo(() => {
-    const global = window as any
+    const global = globalThis as any
     const dataUrl = 'data://' + pathname
     const eventName = 'useDeno-' + dataUrl
     const key = dataUrl + '#' + id
@@ -83,7 +83,10 @@ export function useDeno<T = any>(callback: () => (T | Promise<T>), revalidate?:
         return v
       }
     }
-    return global[key].value || null
+    if (key in global) {
+      return global[key].value
+    }
+    return null
   }, [id, pathname])
 }