build: set version to 2.2.0-SNAPSHOT

Author: javier-godoy

pom.xml

@@ -4,7 +4,7 @@
 
     <groupId>com.flowingcode.vaadin.addons.chipfield</groupId>
     <artifactId>chipfield-addon</artifactId>
-    <version>2.1.1-SNAPSHOT</version>
+    <version>2.2.0-SNAPSHOT</version>
     <name>ChipField Addon</name>
     <description>Integration of paper-chip for Vaadin 14 as a field</description>