mediaType enum is not exported

[tgpetrov]

Make sure to check the demo app(s) for sample usage

Done

Make sure to check the existing issues in this repository

Done

If the demo apps cannot help and there is no issue for your problem, tell us about it

There is a ImagePickerMediaType enum that seems like it can be added to the demo app:

let context = imagepicker.create({ mode: "single", mediaType: imagepicker.ImagePickerMediaType.Image });

However when I run the app, it crashes with Cannot read property 'Image' of undefined

Which platform(s) does your issue occur on?

• iOS/Android/Both
• iOS/Android versions any
• emulator or device. What type of device? both

Please, provide the following version numbers that your issue occurs with:

• CLI: (run tns --version to fetch it) 6.0.2
• Cross-platform modules: (check the 'version' attribute in the
  node_modules/tns-core-modules/package.json file in your project) 6.0.0
• Runtime(s): (look for the "tns-android" and "tns-ios" properties in the package.json file of your project) 6.0.0
• Plugin(s): (look for the version numbers in the package.json file of your
  project and paste your dependencies and devDependencies here)

Please, tell us how to recreate the issue in as much detail as possible.

Go to demo app and replace this line:

let context = imagepicker.create({ mode: "single" });

with:

let context = imagepicker.create({ mode: "single", mediaType: imagepicker.ImagePickerMediaType.Image });

Run the app and tap the PICK SINGLE button.

expected: app to work same as before change
actual: app crashes

[zbranzov]

The fix is published in nativescript-imagepicker@6.3.0