title: How to pass image asset in imageprovider type?
body: <p>I currently depend on <em>splashscreen 1.2.0</em> package for the a flutter app.
  But the <em>backgroundimage</em> variable type is <em>imageprovider</em>, whereas I want to use the image from assets folder. Does anyone know how to pass the image asset file to be able to use as the <em>imageprovider</em> type or maybe any other way to make it work?</p>
  
  <p>Cause using the <em>imageprovider</em> it just loaded a bit later on compared to the other properties.</p>
  
  <p>Many thanks!</p>
  
  <p>I've tried using the Image.asset() but didn't work.</p>
  
  <pre><code>return SplashScreen(
      seconds: 5,
      navigateAfterSeconds: AppRoute,
      title: Text('Welcome', style: AppTextStyle),
      image: Image.asset(AppAsset.logo),
      photoSize: AppScreen,
      imageBackground: Image.asset(AppAsset.background),
      loaderColor: AppColor,
      loadingText: Text('Loading'),
      styleTextUnderTheLoader: AppTextStyle,
      onClick: () {},
   );
  </code></pre>
  
  <p>Expected to be able to use Image.assets but it only works for the network image.</p>