Add version 7.4.2

Author: tomcallahan

.ci/bwcVersions

@@ -10,6 +10,7 @@ BWC_VERSION:
   - "7.3.2"
   - "7.4.0"
   - "7.4.1"
+  - "7.4.2"
   - "7.5.0"
   - "7.6.0"
   - "8.0.0"

server/src/main/java/org/elasticsearch/Version.java

@@ -68,6 +68,7 @@ public class Version implements Comparable<Version>, ToXContentFragment {
     public static final Version V_7_3_2 = new Version(7030299, org.apache.lucene.util.Version.LUCENE_8_1_0);
     public static final Version V_7_4_0 = new Version(7040099, org.apache.lucene.util.Version.LUCENE_8_2_0);
     public static final Version V_7_4_1 = new Version(7040199, org.apache.lucene.util.Version.LUCENE_8_2_0);
+    public static final Version V_7_4_2 = new Version(7040299, org.apache.lucene.util.Version.LUCENE_8_2_0);
     public static final Version V_7_5_0 = new Version(7050099, org.apache.lucene.util.Version.LUCENE_8_2_0);
     public static final Version V_7_6_0 = new Version(7060099, org.apache.lucene.util.Version.LUCENE_8_3_0);
     public static final Version V_8_0_0 = new Version(8000099, org.apache.lucene.util.Version.LUCENE_8_3_0);