Bump modelmapper from 2.3.9 to 2.4.0

Bumps [modelmapper](https://github.com/modelmapper/modelmapper) from 2.3.9 to 2.4.0.
- [Release notes](https://github.com/modelmapper/modelmapper/releases)
- [Changelog](https://github.com/modelmapper/modelmapper/blob/master/CHANGES.md)
- [Commits](modelmapper/modelmapper@modelmapper-parent-2.3.9...modelmapper-parent-2.4.0)

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

build.gradle

@@ -235,7 +235,7 @@ configure(allJavaProjects) {
     def springBootVersion = '2.3.1.RELEASE'
     def hibernateValidatorVersion = '6.2.0.Final'
     def thymeleafVersion = '3.0.4.RELEASE'
-    def modelMapperVersion = '2.3.9'
+    def modelMapperVersion = '2.4.0'
 
     def bootstrapVersion = '4.6.0-1'
     def jqueryVersion = '3.6.0'