title: JUnit 5 vintage engine for JUnit 4 error: Unsupported version of junit:junit: 4.11. Please upgrade to version 4.12 or later. How to downgrade?
body: <pre class="lang-java prettyprint-override"><code>Internal Error occurred.
  org.junit.platform.commons.JUnitException: TestEngine with ID 'junit-vintage' failed to discover tests
      at org.junit.platform.launcher.core.EngineDiscoveryOrchestrator.discoverEngineRoot(EngineDiscoveryOrchestrator.java:111)
      at org.junit.platform.launcher.core.EngineDiscoveryOrchestrator.discover(EngineDiscoveryOrchestrator.java:85)
      at org.junit.platform.launcher.core.DefaultLauncher.discover(DefaultLauncher.java:92)
      at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:75)
      at com.intellij.junit5.JUnit5IdeaTestRunner.startRunnerWithArgs(JUnit5IdeaTestRunner.java:71)
      at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33)
      at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:220)
      at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:53)
  Caused by: org.junit.platform.commons.JUnitException: Unsupported version of junit:junit: 4.11. Please upgrade to version 4.12 or later.
      at org.junit.vintage.engine.JUnit4VersionCheck.checkSupported(JUnit4VersionCheck.java:49)
      at org.junit.vintage.engine.JUnit4VersionCheck.checkSupported(JUnit4VersionCheck.java:35)
      at org.junit.vintage.engine.VintageTestEngine.discover(VintageTestEngine.java:62)
      at org.junit.platform.launcher.core.EngineDiscoveryOrchestrator.discoverEngineRoot(EngineDiscoveryOrchestrator.java:103)
      ... 7 more
  </code></pre>
  <p>When I use JUnit 5 with vintage engine, this error appears. The aim was to:</p>
  <ul>
  <li>attempt to move to JUnit 5 gradually, without breaking existing JUnit 4 tests in one module of the whole, big project</li>
  <li>do not touch existing JUnit 4 dependency in my module</li>
  </ul>
  <p>So, how do I know which version should I downgrade JUnit 5 to, in order to be compatible with JUnit 4.11? I now have 5.7.0.</p>