build: increase version to 2.2.0-SNAPSHOT

Author: Felipe Lang

pom.xml

@@ -4,7 +4,7 @@
 
     <groupId>com.flowingcode.addons</groupId>
     <artifactId>simple-timer</artifactId>
-    <version>2.1.2-SNAPSHOT</version>
+    <version>2.2.0-SNAPSHOT</version>
     <name>Simple Timer Addon</name>
     <description>Simple Timer for Vaadin Flow</description>