Update to 'readable-stream@4.2.0' to support running inside webworker

[motabass]

I'm using music-metadata-browser inside a worker in my angualar app. The only way i could make that work was by forcing this lib to use the latest version of readable-stream by adding the following to my package.json:

"overrides": { "readable-stream": "4.2.0" }

without this i get the following error from readable-stream:

Uncaught ReferenceError: global is not defined at 73816 (_stream_readable.js:48:21) at __webpack_require__ (bootstrap:19:1)

nodejs/readable-stream#489

#758

[subframe7536]

+1