Update Spring examples to 2.5.3

Fixes #99

Author: edeandrea

chapter-3/chapter-3-spring-rest-json/pom.xml

@@ -5,7 +5,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>2.5.2</version>
+		<version>2.5.3</version>
 		<relativePath/> <!-- lookup parent from repository -->
 	</parent>
 	<groupId>org.acme</groupId>
@@ -15,7 +15,7 @@
 	<description>Chapter 3 Spring Rest Json</description>
 	<properties>
 		<java.version>11</java.version>
-		<springdoc.version>1.5.5</springdoc.version>
+		<springdoc.version>1.5.9</springdoc.version>
 	</properties>
 	<dependencies>
 		<dependency>

chapter-3/chapter-3-spring-webflux-rest-json/pom.xml

@@ -5,7 +5,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>2.5.2</version>
+		<version>2.5.3</version>
 		<relativePath/> <!-- lookup parent from repository -->
 	</parent>
 	<groupId>org.acme</groupId>
@@ -15,7 +15,7 @@
 	<description>Chapter 3 Spring WebFlux Rest Json</description>
 	<properties>
 		<java.version>11</java.version>
-		<springdoc.version>1.5.5</springdoc.version>
+		<springdoc.version>1.5.9</springdoc.version>
 	</properties>
 	<dependencies>
 		<dependency>

chapter-4/chapter-4-spring-data-jpa/pom.xml

@@ -5,7 +5,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>2.5.2</version>
+		<version>2.5.3</version>
 		<relativePath/> <!-- lookup parent from repository -->
 	</parent>
 	<groupId>org.acme</groupId>

chapter-4/chapter-4-spring-data-r2dbc/pom.xml

@@ -5,7 +5,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>2.5.2</version>
+		<version>2.5.3</version>
 		<relativePath/> <!-- lookup parent from repository -->
 	</parent>
 	<groupId>org.acme</groupId>

chapter-5/chapter-5-spring-cloud-events/pom.xml

@@ -5,7 +5,7 @@
   <parent>
     <groupId>org.springframework.boot</groupId>
     <artifactId>spring-boot-starter-parent</artifactId>
-    <version>2.5.2</version>
+    <version>2.5.3</version>
     <relativePath />
   </parent>
 

chapter-5/chapter-5-spring-eventbus/pom.xml

@@ -5,7 +5,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>2.5.2</version>
+		<version>2.5.3</version>
 		<relativePath/> <!-- lookup parent from repository -->
 	</parent>
 	<groupId>org.acme</groupId>

chapter-5/chapter-5-spring-kafka-streams/pom.xml

@@ -5,7 +5,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>2.5.2</version>
+		<version>2.5.3</version>
 		<relativePath/> <!-- lookup parent from repository -->
 	</parent>
 	<groupId>org.acme</groupId>