Bump spring-boot.version from 2.3.5.RELEASE to 2.4.0

Bumps `spring-boot.version` from 2.3.5.RELEASE to 2.4.0.

Updates `spring-boot-dependencies` from 2.3.5.RELEASE to 2.4.0
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v2.3.5.RELEASE...v2.4.0)

Updates `spring-boot-starter-test` from 2.3.5.RELEASE to 2.4.0
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v2.3.5.RELEASE...v2.4.0)

Updates `spring-boot-maven-plugin` from 2.3.5.RELEASE to 2.4.0
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v2.3.5.RELEASE...v2.4.0)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

pom.xml

@@ -72,7 +72,7 @@
     <mybatis-freemarker.version>1.2.2</mybatis-freemarker.version>
     <mybatis-velocity.version>2.1.0</mybatis-velocity.version>
     <mybatis-thymeleaf.version>1.0.2</mybatis-thymeleaf.version>
-    <spring-boot.version>2.3.5.RELEASE</spring-boot.version>
+    <spring-boot.version>2.4.0</spring-boot.version>
   </properties>
 
   <dependencyManagement>