qmllint: Missing type information for WebEngine

import QtQuick
import QtQuick.Window
import QtWebEngine

Window {
    width: 640
    height: 480
    visible: true
    title: qsTr("Hello World")

    WebEngineView {
        id: webEngine

        anchors.fill: parent
        url: "https://www.qt.io"

        onJavaScriptConsoleMessage: function(level, message, lineNumber) {
            console.log("JavaScript Console:", lineNumber, level, message)
        }

        onContextMenuRequested: function(request) {
            request.accepted = true;
        }

        onRenderProcessTerminated: function(terminationStatus, exitCode) {
            console.log("Render process exited with code", exitCode. terminationStatus);
        }

        onWindowCloseRequested: {
        }

        onFeaturePermissionRequested: function(securityOrigin, feature) {
            switch (feature) {
            case WebEngineView.MediaAudioCapture:
            case WebEngineView.MediaVideoCapture:
            case WebEngineView.MediaAudioVideoCapture:
            case WebEngineView.DesktopAudioVideoCapture:
                grantFeaturePermission(securityOrigin, feature, true);
                break;
            default:
                console.log("Feature not granted");
            }
        }

        onNewWindowRequested: function(request) {
            console.log("Open URL in external browser", request.requestedUrl);
            Qt.openUrlExternally(request.requestedUrl);
        }
    }
}

Warning: .../Main.qml:17:9: Type JavaScriptConsoleMessageLevel of parameter level in signal called javaScriptConsoleMessage was not found, but is required to compile onJavaScriptConsoleMessage. Did you add all import paths? [signal-handler-parameters]
        onJavaScriptConsoleMessage: function(level, message, lineNumber) {
        ^^^^^^^^^^^^^^^^^^^^^^^^^^
Warning: .../Main.qml:25:9: Type RenderProcessTerminationStatus of parameter terminationStatus in signal called renderProcessTerminated was not found, but is required to compile onRenderProcessTerminated. Did you add all import paths? [signal-handler-parameters]
        onRenderProcessTerminated: function(terminationStatus, exitCode) {
        ^^^^^^^^^^^^^^^^^^^^^^^^^
Warning: .../Main.qml:32:9: Type Feature of parameter feature in signal called featurePermissionRequested was not found, but is required to compile onFeaturePermissionRequested. Did you add all import paths? [signal-handler-parameters]
        onFeaturePermissionRequested: function(securityOrigin, feature) {
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Warning: .../Main.qml:26:70: Member "terminationStatus" not found on type "int" [missing-property]
            console.log("Render process exited with code", exitCode. terminationStatus);
                                                                     ^^^^^^^^^^^^^^^^^