- Fixed "null" path issue on Android 11 MIUI devices

- When a large image/video is picked and it needs to be copied to the app's cache directory, a progressbar will be displayed instead of freezing the screen until the copy operation is completed (fixes yasirkula#226)

Bumped package version

Moved iOS build post-processor settings to 'Project Settings/yasirkul…

…a/Native Gallery'

Embedded proguard.txt file to AAR library which should get rid of Cla…

…ssNotFoundExceptions automatically

Added overwriteExistingMedia (false) and mediaSaveOmitDCIM (false) va…

…riables to Android native source code

Apply [Flags] attribute for NativeGallery.MediaType (yasirkula#158)

Bumped version

Fixed minor issue: yasirkula#138

Updated README

Added GetMediaTypeOfFile function (closed yasirkula#133)