Set version to v3.4.0-rc0

Set events-broker and Gerrit versions to
v3.4.0-rc0 for publishing to Maven central.

Change-Id: I55dc81774d856c5cfc0b435268f69c2ddfe06b4e

pom.xml

diff --git a/pom.xml b/pom.xml
index 1ddcff8..68dd601 100644
--- a/pom.xml
+++ b/pom.xml
@@ -4,7 +4,7 @@
 
     <groupId>com.gerritforge</groupId>
     <artifactId>events-broker</artifactId>
-    <version>3.4-alpha-20210205083200</version>
+    <version>3.4.0-rc0</version>
     <packaging>jar</packaging>
 
     <name>events-broker</name>
@@ -39,7 +39,7 @@
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <auto-value.version>1.7.4</auto-value.version>
-        <gerrit.version>3.4.0-SNAPSHOT</gerrit.version>
+        <gerrit.version>3.4.0-rc0</gerrit.version>
     </properties>
 
     <dependencies>