chore(main): release 2.6.4-SNAPSHOT (#185)

Co-authored-by: developer-experience-bot[bot] <91079284+developer-experience-bot[bot]@users.noreply.github.com>

Author: developer-experience-bot[bot]

pom.xml

@@ -4,7 +4,7 @@
 
     <groupId>com.coveo</groupId>
     <artifactId>push-api-client.java</artifactId>
-    <version>2.6.3</version>
+    <version>2.6.4-SNAPSHOT</version>
     <name>${project.groupId}:${project.artifactId}</name>
     <packaging>jar</packaging>
     <description>Coveo Push API client. See more on https://github.com/coveo/push-api-client.java</description>