title: AndroidX migration using Jetifier tool converts support libraries to RC versions
body: <p>In the process of migrating to Android X, tt seems that Jetifier tool converts some of the 3rd party libraries to RC versions (gradle-4.6).</p>
  
  <pre><code> |    +--- com.facebook.android:facebook-common:4.34.0
  |    |    |    +--- com.facebook.android:facebook-core:4.34.0 (*)
  |    |    |    +--- com.google.zxing:core:3.3.0
  |    |    |    +--- androidx.legacy:legacy-support-v4:1.0.0-rc01
  |    |    |    |    +--- androidx.core:core:1.0.0-rc01 -&gt; 1.0.1 (*)
  |    |    |    |    +--- androidx.media:media:1.0.0-rc01
  |    |    |    |    |    +--- androidx.annotation:annotation:1.0.0-rc01 -&gt; 1.0.0
  |    |    |    |    |    +--- androidx.core:core:1.0.0-rc01 -&gt; 1.0.1 (*)
  |    |    |    |    |    \--- androidx.versionedparcelable:versionedparcelable:1.0.0-rc01 -&gt; 1.0.0 (*)
  |    |    |    |    +--- androidx.legacy:legacy-support-core-utils:1.0.0-rc01 -&gt; 1.0.0 (*)
  |    |    |    |    +--- androidx.legacy:legacy-support-core-ui:1.0.0-rc01 -&gt; 1.0.0 (*)
  |    |    |    |    \--- androidx.fragment:fragment:1.0.0-rc01 -&gt; 1.0.0 (*)
  |    |    |    +--- androidx.appcompat:appcompat:1.0.0-rc01 -&gt; 1.0.2 (*)
  |    |    |    +--- androidx.cardview:cardview:1.0.0-rc01 -&gt; 1.0.0 (*)
  |    |    |    \--- androidx.browser:browser:1.0.0-rc01
  |    |    |         +--- androidx.core:core:1.0.0-rc01 -&gt; 1.0.1 (*)
  |    |    |         +--- androidx.annotation:annotation:1.0.0-rc01 -&gt; 1.0.0
  |    |    |         +--- androidx.interpolator:interpolator:1.0.0-rc01 -&gt; 1.0.0 (*)
  |    |    |         +--- androidx.collection:collection:1.0.0-rc01 -&gt; 1.0.0 (*)
  |    |    |         \--- androidx.legacy:legacy-support-core-ui:1.0.0-rc01 -&gt; 1.0.0 (*)
  </code></pre>
  
  <p>Is there a solution I can force to take only stable (fixed) versions?</p>