Bump version; remove Spring Boot app; add deps

Bump project version from 21.0.1 to 21.0.2. Remove the Spring Boot application class and its test and drop spring-boot-starter / spring-boot-starter-test entries from the POM. Add org.slf4j:slf4j-api:2.1.0-alpha1 (compile) and org.assertj:assertj-core:4.0.0-M1 (test) dependencies.

Author: srikanthkapila

pom.xml

@@ -6,7 +6,7 @@
 	<modelVersion>4.0.0</modelVersion>
 	<groupId>io.github.openjavalibs</groupId>
 	<artifactId>pojo-tester</artifactId>
-	<version>21.0.1</version>
+	<version>21.0.2</version>
 	<packaging>jar</packaging>
 	<name>pojo-tester</name>
 	<description>Pojo Tester</description>
@@ -43,11 +43,6 @@
 		<maven.compiler.target>21</maven.compiler.target>
 	</properties>
 	<dependencies>
-		<dependency>
-			<groupId>org.springframework.boot</groupId>
-			<artifactId>spring-boot-starter</artifactId>
-			<version>3.3.5</version>
-		</dependency>
 		<!--
 		https://mvnrepository.com/artifact/org.apache.commons/commons-collections4 -->
 		<dependency>
@@ -76,6 +71,14 @@
 			<version>3.4.0</version>
 		</dependency>
 
+		<!-- Source: https://mvnrepository.com/artifact/org.slf4j/slf4j-api -->
+		<dependency>
+			<groupId>org.slf4j</groupId>
+			<artifactId>slf4j-api</artifactId>
+			<version>2.1.0-alpha1</version>
+			<scope>compile</scope>
+		</dependency>
+
 		<!-- https://mvnrepository.com/artifact/org.projectlombok/lombok -->
 		<dependency>
 			<groupId>org.projectlombok</groupId>
@@ -128,20 +131,21 @@
 			<scope>test</scope>
 		</dependency>
 
+		<!-- Source: https://mvnrepository.com/artifact/org.assertj/assertj-core -->
+		<dependency>
+			<groupId>org.assertj</groupId>
+			<artifactId>assertj-core</artifactId>
+			<version>4.0.0-M1</version>
+			<scope>test</scope>
+		</dependency>
+
 		<!-- https://mvnrepository.com/artifact/net.bytebuddy/byte-buddy -->
 		<dependency>
 			<groupId>net.bytebuddy</groupId>
 			<artifactId>byte-buddy</artifactId>
 			<version>1.15.10</version>
 		</dependency>
 
-		<dependency>
-			<groupId>org.springframework.boot</groupId>
-			<artifactId>spring-boot-starter-test</artifactId>
-			<version>3.3.5</version>
-			<scope>test</scope>
-		</dependency>
-
 		<!--
 		https://mvnrepository.com/artifact/org.powermock/powermock-module-junit4 -->
 		<dependency>