Add pre-release "PR" to dependency rules.

Author: sowerstl

plugin_rules.xml

@@ -7,6 +7,7 @@
         <ignoreVersion type="regex">(?i).*Beta(?:-?\d+)?$</ignoreVersion>
         <ignoreVersion type="regex">(?i).*-B(?:-?\d+)?$</ignoreVersion>
         <ignoreVersion type="regex">(?i).*RC(?:-?\d+)?$</ignoreVersion>
+        <ignoreVersion type="regex">(?i).*PR(?:-?\d+)?$</ignoreVersion>
         <ignoreVersion type="regex">(?i).*CR(?:-?\d+)?$</ignoreVersion>
         <ignoreVersion type="regex">(?i).*M(?:-?\d+)?$</ignoreVersion>
         <ignoreVersion type="regex">(?i).*jre[67]$</ignoreVersion>