title: Failed to resolve: com.android.support:appcompat-v7:28.0
body: <p>When I use <code>com.android.support:appcompat-v7:28.+</code> in my project's <code>build.gradle</code>(module) it works without any error. But when I just use <code>com.android.support:appcompat-v7:28</code>, just without <code>.+</code>, it gives me an error: </p>
  
  <blockquote>
    <p>Failed to resolve: com.android.support:appcompat-v7:28.0</p>
  </blockquote>
  
  <p>Just without the <code>.+</code> end of it. I added maven before but the result was the same. Any idea to solve it?</p>