Update README.md for 2.0 after multi upload support implementation
Update README.md for 2.0 after multi upload support implementation

NativeScript/android-upload-service,NativeScript/android-upload-service,alexbbb/android-upload-service,alexbbb/android-upload-service,gotev/android-upload-service,gotev/android-upload-service,NativeScript/android-upload-service