use same method name _readBody() for both express v4 and v5. See https://github.com/colyseus/colyseus/commit/5896608bda25689cce7ec461be5978593fa2d7ab\#diff-9fce17428f56a2a163446e1087d20ded01ddccbb73604ec1a8cb5834fe6d9de9R132-R273

Author: endel

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "uwebsockets-express",
-  "version": "1.4.1",
+  "version": "1.4.2",
   "description": "Express API compatibility layer for uWebSockets.js",
   "main": "./build/index.js",
   "module": "./build/index.mjs",

package.json

@@ -58,7 +58,7 @@ export class Application extends EventEmitter {
       // read body data!
       if (req.headers['content-length']) {
         try {
-          await req['readBody']();
+          await req['_readBody']();
         } catch (e) {
           console.warn("uWebSockets-express: failed reading request body at", url);
         }

src/Application.ts

@@ -161,7 +161,7 @@ export class IncomingMessage extends EventEmitter implements http.IncomingMessag
     return this;
   }
 
-  protected readBody () {
+  protected _readBody () {
     return new Promise<boolean>((resolve, reject) => {
       let body: Buffer;