cordova-plugin-qrscanner: iOS can't compile on Xcode 10.2.1 Swift 5/4.2/4

Hi!

I can’t compile this cordova plugin on Xcode 10.2.1 and I tried with Swift 5/4.2 and 4.

/Users/user/Documents/Mobile/platforms/ios/project/Plugins/cordova-plugin-qrscanner/QRScanner.swift:483:16: warning: unnecessary check for 'iOS'; enclosing scope ensures guard will always be true
            if #available(iOS 8.0, *) {
               ^
/Users/user/Documents/Mobile/platforms/ios/project/Plugins/cordova-plugin-qrscanner/QRScanner.swift:470:9: note: enclosing scope here
        if #available(iOS 10.0, *) {
        ^
/Users/user/Documents/Mobile/platforms/ios/project/Plugins/cordova-plugin-qrscanner/QRScanner.swift:33:37: error: value of optional type 'AVCaptureConnection?' must be unwrapped to refer to member 'videoOrientation' of wrapped base type 'AVCaptureConnection'
            self.videoPreviewLayer?.connection.videoOrientation = interfaceOrientationToVideoOrientation(UIApplication.shared.statusBarOrientation);
                                    ^
/Users/user/Documents/Mobile/platforms/ios/project/Plugins/cordova-plugin-qrscanner/QRScanner.swift:33:37: note: chain the optional using '?' to access member 'videoOrientation' only for non-'nil' base values
            self.videoPreviewLayer?.connection.videoOrientation = interfaceOrientationToVideoOrientation(UIApplication.shared.statusBarOrientation);
                                    ^
                                              ?
/Users/user/Documents/Mobile/platforms/ios/project/Plugins/cordova-plugin-qrscanner/QRScanner.swift:33:37: note: force-unwrap using '!' to abort execution if the optional value contains 'nil'
            self.videoPreviewLayer?.connection.videoOrientation = interfaceOrientationToVideoOrientation(UIApplication.shared.statusBarOrientation);
                                    ^
                                              !
/Users/user/Documents/Mobile/platforms/ios/project/Plugins/cordova-plugin-qrscanner/QRScanner.swift:89:64: error: argument of '#selector' refers to instance method 'pageDidLoad()' that is not exposed to Objective-C
        NotificationCenter.default.addObserver(self, selector: #selector(pageDidLoad), name: NSNotification.Name.CDVPageDidLoad, object: nil)
                                                               ^         ~~~~~~~~~~~
/Users/user/Documents/Mobile/platforms/ios/project/Plugins/cordova-plugin-qrscanner/QRScanner.swift:249:10: note: add '@objc' to expose this instance method to Objective-C
    func pageDidLoad() {
         ^
    @objc 
/Users/user/Documents/Mobile/platforms/ios/project/Plugins/cordova-plugin-qrscanner/QRScanner.swift:124:57: error: incorrect argument label in call (have 'forMediaType:', expected 'for:')
        let status = AVCaptureDevice.authorizationStatus(forMediaType: AVMediaTypeVideo)
                                                        ^~~~~~~~~~~~~
                                                         for
/Users/user/Documents/Mobile/platforms/ios/project/Plugins/cordova-plugin-qrscanner/QRScanner.swift:136:68: error: incorrect argument label in call (have 'withMediaType:', expected 'for:')
                let availableVideoDevices = AVCaptureDevice.devices(withMediaType: AVMediaTypeVideo)
                                                                   ^~~~~~~~~~~~~~
                                                                    for
/Users/user/Documents/Mobile/platforms/ios/project/Plugins/cordova-plugin-qrscanner/QRScanner.swift:154:43: error: value of optional type 'AVCaptureMetadataOutput?' must be unwrapped to a value of type 'AVCaptureMetadataOutput'
                captureSession!.addOutput(metaOutput)
                                          ^
/Users/user/Documents/Mobile/platforms/ios/project/Plugins/cordova-plugin-qrscanner/QRScanner.swift:154:43: note: coalesce using '??' to provide a default when the optional value contains 'nil'
                captureSession!.addOutput(metaOutput)
                                          ^
                                                     ?? <#default value#>
/Users/user/Documents/Mobile/platforms/ios/project/Plugins/cordova-plugin-qrscanner/QRScanner.swift:154:43: note: force-unwrap using '!' to abort execution if the optional value contains 'nil'
                captureSession!.addOutput(metaOutput)
                                          ^
                                                    !
/Users/user/Documents/Mobile/platforms/ios/project/Plugins/cordova-plugin-qrscanner/QRScanner.swift:157:80: error: value of optional type 'AVCaptureSession?' must be unwrapped to a value of type 'AVCaptureSession'
                captureVideoPreviewLayer = AVCaptureVideoPreviewLayer(session: captureSession)
                                                                               ^
/Users/user/Documents/Mobile/platforms/ios/project/Plugins/cordova-plugin-qrscanner/QRScanner.swift:157:80: note: coalesce using '??' to provide a default when the optional value contains 'nil'
                captureVideoPreviewLayer = AVCaptureVideoPreviewLayer(session: captureSession)
                                                                               ^
                                                                                              ?? <#default value#>
/Users/user/Documents/Mobile/platforms/ios/project/Plugins/cordova-plugin-qrscanner/QRScanner.swift:157:80: note: force-unwrap using '!' to abort execution if the optional value contains 'nil'
                captureVideoPreviewLayer = AVCaptureVideoPreviewLayer(session: captureSession)
                                                                               ^
                                                                                             !
/Users/user/Documents/Mobile/platforms/ios/project/Plugins/cordova-plugin-qrscanner/QRScanner.swift:257:57: error: incorrect argument label in call (have 'forMediaType:', expected 'for:')
        let status = AVCaptureDevice.authorizationStatus(forMediaType: AVMediaTypeVideo)
                                                        ^~~~~~~~~~~~~
                                                         for
/Users/user/Documents/Mobile/platforms/ios/project/Plugins/cordova-plugin-qrscanner/QRScanner.swift:260:42: error: incorrect argument label in call (have 'forMediaType:completionHandler:', expected 'for:completionHandler:')
            AVCaptureDevice.requestAccess(forMediaType: AVMediaTypeVideo, completionHandler: { (granted) -> Void in
                                         ^~~~~~~~~~~~~
                                          for
/Users/user/Documents/Mobile/platforms/ios/project/Plugins/cordova-plugin-qrscanner/QRScanner.swift:308:35: error: value of optional type 'AVCaptureConnection?' must be unwrapped to refer to member 'isEnabled' of wrapped base type 'AVCaptureConnection'
        captureVideoPreviewLayer?.connection.isEnabled = false
                                  ^
/Users/user/Documents/Mobile/platforms/ios/project/Plugins/cordova-plugin-qrscanner/QRScanner.swift:308:35: note: chain the optional using '?' to access member 'isEnabled' only for non-'nil' base values
        captureVideoPreviewLayer?.connection.isEnabled = false
                                  ^
                                            ?
/Users/user/Documents/Mobile/platforms/ios/project/Plugins/cordova-plugin-qrscanner/QRScanner.swift:308:35: note: force-unwrap using '!' to abort execution if the optional value contains 'nil'
        captureVideoPreviewLayer?.connection.isEnabled = false
                                  ^
                                            !
/Users/user/Documents/Mobile/platforms/ios/project/Plugins/cordova-plugin-qrscanner/QRScanner.swift:317:35: error: value of optional type 'AVCaptureConnection?' must be unwrapped to refer to member 'isEnabled' of wrapped base type 'AVCaptureConnection'
        captureVideoPreviewLayer?.connection.isEnabled = true
                                  ^
/Users/user/Documents/Mobile/platforms/ios/project/Plugins/cordova-plugin-qrscanner/QRScanner.swift:317:35: note: chain the optional using '?' to access member 'isEnabled' only for non-'nil' base values
        captureVideoPreviewLayer?.connection.isEnabled = true
                                  ^
                                            ?
/Users/user/Documents/Mobile/platforms/ios/project/Plugins/cordova-plugin-qrscanner/QRScanner.swift:317:35: note: force-unwrap using '!' to abort execution if the optional value contains 'nil'
        captureVideoPreviewLayer?.connection.isEnabled = true
                                  ^
                                            !
/Users/user/Documents/Mobile/platforms/ios/project/Plugins/cordova-plugin-qrscanner/QRScanner.swift:398:70: error: incorrect argument label in call (have 'forMediaType:', expected 'for:')
        let authorizationStatus = AVCaptureDevice.authorizationStatus(forMediaType: AVMediaTypeVideo);
                                                                     ^~~~~~~~~~~~~
                                                                      for
/Users/user/Documents/Mobile/platforms/ios/project/Plugins/cordova-plugin-qrscanner/QRScanner.swift:422:52: error: value of optional type 'AVCaptureConnection?' must be unwrapped to refer to member 'isEnabled' of wrapped base type 'AVCaptureConnection'
            previewing = captureVideoPreviewLayer!.connection.isEnabled
                                                   ^
/Users/user/Documents/Mobile/platforms/ios/project/Plugins/cordova-plugin-qrscanner/QRScanner.swift:422:52: note: chain the optional using '?' to access member 'isEnabled' only for non-'nil' base values
            previewing = captureVideoPreviewLayer!.connection.isEnabled
                                                   ^
                                                             ?
/Users/user/Documents/Mobile/platforms/ios/project/Plugins/cordova-plugin-qrscanner/QRScanner.swift:422:52: note: force-unwrap using '!' to abort execution if the optional value contains 'nil'
            previewing = captureVideoPreviewLayer!.connection.isEnabled
                                                   ^
                                                             !

** BUILD FAILED **


The following build commands failed:
	CompileSwift normal x86_64 /Users/user/Documents/Mobile/platforms/ios/project/Plugins/cordova-plugin-qrscanner/QRScanner.swift
	CompileSwiftSources normal x86_64 com.apple.xcode.tools.swift.compiler
(2 failures)
xcodebuild: Command failed with exit code 65

If I delete this plugin from cordova and compile again it will work perfectly fine. I’m using the last version available on NPM (3.0.1) of this plugin.