title: How to solve 'could not find package integration_test in the Flutter SDK' error
body: <p>I have an app, it is very simple and I keep getting this error:</p>
  <blockquote>
  <p>pub get failed (server unavailable) -- attempting retry 1 in 1
  second... Because bascis depends on integration_test any from sdk
  which doesn't exist (could not find package integration_test in the
  Flutter SDK), version solving failed.</p>
  </blockquote>
  <p>I have tried</p>
  <p>Pup upgrade, Pub get.</p>
  <p>How can I get rid of this error?</p>