feat: Support for asynchronous getLoadContext (#22)

* Support for asynchronous `getLoadContext`

* check `remixContext` is promise or not

---------

Co-authored-by: Yusuke Wada <yusuke@kamawada.com>

Author: ogadra

src/dev.ts

@@ -23,7 +23,7 @@ export const handle = (userApp?: Hono, options?: Options) => {
     const args = createGetLoadContextArgs(c)
 
     const remixContext = getLoadContext(args)
-    return handler(c.req.raw, remixContext)
+    return handler(c.req.raw, remixContext instanceof Promise ? await remixContext : remixContext)
   })
 
   return app

src/remix.ts

@@ -8,10 +8,10 @@ export type GetLoadContext = (args: {
     // eslint-disable-next-line @typescript-eslint/no-explicit-any
     cloudflare: any
   }
-}) => AppLoadContext
+}) => AppLoadContext | Promise<AppLoadContext>
 
 // eslint-disable-next-line @typescript-eslint/no-explicit-any
-export const defaultGetLoadContext = ({ context }: any) => {
+export const defaultGetLoadContext = ({ context }: any): AppLoadContext => {
   return {
     ...context,
   }