[Feature Request] Allow hide the front camera. about html5-qrcode

[EinfachPaul0]

The following automatically chooses the last camera in the list, it worked for me:

e.getCameras = function () {
                        if (navigator.mediaDevices) return e.getCamerasFromMediaDevices().then(cameras => [cameras[cameras.length - 1]]);
                        
                        var t = MediaStreamTrack;
                        
                        if (MediaStreamTrack && t.getSources) return e.getCamerasFromMediaStreamTrack();
                        
                        var r = w.unableToQuerySupportedDevices();
                        
                        return (
                            (function () {
                                if ("https:" === location.protocol) return !0;
                                var t = location.host.split(":")[0];
                                return "127.0.0.1" === t || "localhost" === t;
                            })() || (r = w.insecureContextCameraQueryError()),
                            Promise.reject(r)
                        );
                    },