Node.js: added "shortCircuit" option for ES modules hook.

Starting from Node.js v18.6.0 return value from all hooks must have
"shortCircuit: true" option specified.  For more information see:
https://github.com/nodejs/node/commit/10bcad5c6e

src/nodejs/unit-http/loader.mjs

@@ -4,13 +4,15 @@ export async function resolve(specifier, context, defaultResolver) {
         case "websocket":
             return {
                 url: new URL("./websocket.js", import.meta.url).href,
-                format: "commonjs"
+                format: "commonjs",
+                shortCircuit: true,
             }
 
         case "http":
             return {
                 url: new URL("./http.js", import.meta.url).href,
-                format: "commonjs"
+                format: "commonjs",
+                shortCircuit: true,
             }
     }