`body` data not passed correctly to the express app

Currently, when using express, the req.body data is incorrectly passed to the express application. I am getting the gibberish trash data from somewhere passed into the request. This problem does not exists if I use getCurrentInvoke to get the body data, which will be correct.

Propose to fix this by changing this line here https://github.com/vendia/serverless-express/blob/mainline/src/frameworks/express.js#L2 from app.handle to app, which should solve the issue. See https://github.com/expressjs/express/blob/master/lib/express.js#L38.

Currently I am using express v4, not sure if this will be the case for express v5 or even prior versions.

I will be more than happy to work on this issue (and other issues as a contributor).

Maybe we can make the event & context data not available for the express Request object in the future as well for convenience.

src/frameworks/express.js の 2 行目から始め、現在の app.handle 参照を Express の lib/express.js の 38 行目と比較してください。Express 4 req.body が getCurrentInvoke を通じて取得した body と一致することを確認し、記載されている Express バージョンの不確実性に対する動作を確認してください。