Simplify rules for maven versions plugin

rules.xml

@@ -3,15 +3,9 @@
          xmlns="http://mojo.codehaus.org/versions-maven-plugin/rule/2.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:schemaLocation="http://mojo.codehaus.org/versions-maven-plugin/rule/2.0.0 https://www.mojohaus.org/versions-maven-plugin/xsd/rule-2.0.0.xsd">
     <ignoreVersions>
-        <!-- Ignore Alpha's, Beta's, release candidates and milestones -->
-        <ignoreVersion type="regex">(?i).*Alpha(?:-?\d+)?</ignoreVersion>
-        <!--<ignoreVersion type="regex">(?i).*a(?:-?\d+)?</ignoreVersion>-->
-        <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).*CR(?:-?\d+)?</ignoreVersion>
+        <!-- Ignore Alpha's, Beta's, release candidates -->
+        <ignoreVersion type="regex">.*[-_\.](alpha|Alpha|ALPHA|b|beta|Beta|BETA|rc|RC|EA)[-_\.]?[0-9]*</ignoreVersion>
         <!-- Not ignoring M (milestone) releases are they are used for "stable" Maven plugin releases -->
-        <!--<ignoreVersion type="regex">(?i).*M(?:-?\d+)?</ignoreVersion>-->
     </ignoreVersions>
     <rules>
     </rules>