title: react-native run-android Could not resolve all dependencies for configuration ':classpath'
body: <p>I am learing  react-native,i got this error when i used command 'react-native run-android' on windows 10</p>
  
  <pre><code>FAILURE: Build failed with an exception.
  
  * What went wrong:
  A problem occurred configuring root project 'demo'.
  &gt; Could not resolve all dependencies for configuration ':classpath'.
     &gt; Could not download gradle-core.jar (com.android.tools.build:gradle-core:1.3.1)
        &gt; Could not get resource 'https://jcenter.bintray.com/com/android/tools/build/gradle-core/1.3.1/gradle-core-1.3.1.jar'.
           &gt; Could not GET 'https://jcenter.bintray.com/com/android/tools/build/gradle-core/1.3.1/gradle-core-1.3.1.jar'.
              &gt; peer not authenticated
  
  * Try:
  Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.
  </code></pre>
  
  <p>I'm tired,I'll be appreciate for you helping me!</p>