Expose a mock socket that is an EventEmitter like a real one would be #101
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Before this change, if a Fastify user attached an `onTimeout` hook to their server, an error would be thrown in test mode when injecting requests with light-my-request
```
TypeError: request.raw.socket.on is not a function
at Object.routeHandler [as handler] (../../node_modules/fastify/lib/route.js:350:28)
at Router.lookup (../../node_modules/find-my-way/index.js:356:14)
at ../../node_modules/light-my-request/index.js:101:38
at Request.prepare (../../node_modules/light-my-request/lib/request.js:110:12)
at ../../node_modules/light-my-request/index.js:101:11
at doInject (../../node_modules/light-my-request/index.js:97:12)
at Chain.<computed> [as then] (../../node_modules/light-my-request/index.js:187:23)
at runMicrotasks (<anonymous>)
```
This fixes the socket object to have an `on` function (as well as the rest of the EventEmitter interface) so that things that add timeout handlers can at least add them without erroring. This doesn't implement actual timeout injection, but I think that could be done in userland by emitting events on the socket manually.
Similar to fastify#99.
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Before this change, if a Fastify user attached an
onTimeouthook to their server, an error would be thrown in test mode when injecting requests with light-my-requestThis fixes the socket object to have an
onfunction (as well as the rest of the EventEmitter interface) so that things that add timeout handlers can at least add them without erroring. This doesn't implement actual timeout injection, but I think that could be done in userland by emitting events on the socket manually.Similar to #99.