chore: update version to 15.3.0-SNAPSHOT

Update project version from 15.2.0-SNAPSHOT to 15.3.0-SNAPSHOT and parent POM version from 15.2.0 to 15.3.0 to align with the latest Fess framework release.

Author: marevol

pom.xml

@@ -6,7 +6,7 @@
 	<artifactId>fess-script-example</artifactId>
 	<packaging>jar</packaging>
 	<name>Example Script Plugin</name>
-	<version>15.2.0-SNAPSHOT</version>
+	<version>15.3.0-SNAPSHOT</version>
 	<scm>
 		<connection>scm:git:git@github.com:codelibs/fess-script-example.git</connection>
 		<developerConnection>scm:git:git@github.com:codelibs/fess-script-example.git</developerConnection>
@@ -15,7 +15,7 @@
 	<parent>
 		<groupId>org.codelibs.fess</groupId>
 		<artifactId>fess-parent</artifactId>
-		<version>15.2.0</version>
+		<version>15.3.0</version>
 		<relativePath />
 	</parent>
 	<build>