Release branch for version 3.3.1

Author: dpaukov

pom.xml

@@ -4,7 +4,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.github.dpaukov</groupId>
   <artifactId>combinatoricslib3</artifactId>
-  <version>3.4.0-SNAPSHOT</version>
+  <version>3.3.1-SNAPSHOT</version>
   <name>combinatoricslib3</name>
   <description>Combinatorial objects stream generators for Java 8.</description>
   <licenses>

src/main/resources/META-INF/README.txt

@@ -2,8 +2,9 @@
              CombinatoricsLib 3 - Release notes
                    by Dmytro Paukov
 
-CombinatoricsLib 3.4.0 (2018)
-
+CombinatoricsLib 3.3.1 (Apr 2021)
+- Add a cartesian product with collection input parameter
+  https://github.com/dpaukov/combinatoricslib3/issues/13
 
 -----------------------------------------------------------------
 CombinatoricsLib 3.3.0 (May 2018)