release 2.2.1-beta.0 (PER-7348) (#313)

Bump version to 2.2.1-beta.0 to ship the readiness gate (waitForReady
before serialize, PER-7348) merged in #308.

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: Shivanshu-07

pom.xml

@@ -5,7 +5,7 @@
 
   <groupId>io.percy</groupId>
   <artifactId>percy-java-selenium</artifactId>
-  <version>2.2.0</version>
+  <version>2.2.1-beta.0</version>
   <packaging>jar</packaging>
 
   <name>${project.groupId}:${project.artifactId}</name>
@@ -32,7 +32,7 @@
     <connection>scm:git:git://github.com/percy/percy-java-selenium.git</connection>
     <developerConnection>scm:git:https://github.com/percy/percy-java-selenium.git</developerConnection>
     <url>https://github.com/percy/percy-java-selenium/tree/master</url>
-    <tag>v2.1.2</tag>
+    <tag>v2.2.1-beta.0</tag>
   </scm>
 
   <properties>

src/main/java/io/percy/selenium/Environment.java

@@ -10,7 +10,7 @@
  */
 class Environment {
   private WebDriver driver;
-  private final static String SDK_VERSION = "2.1.2";
+  private final static String SDK_VERSION = "2.2.1-beta.0";
   private final static String SDK_NAME = "percy-java-selenium";
 
   private String clientInfoOverride;