Vapor: 4.0.0-rc.3.4 Release

This patch was authored by @bridger and released by @tanner0101.

The maximum frame size of an incoming WebSocket packet can be configured. This fixes issues for apps that were running into the limit (#2195, fixes #2194).

let maxFrameSize: Int = 1024 * 1024 * 2 // 2mb
app.webSocket("api", "ws", maxFrameSize: .override(maxFrameSize)) { (request, ws) in
    websocketController.connected(request: request, connection: ws)
}