Bump spring.version from 4.0.5.RELEASE to 5.2.8.RELEASE

Bumps `spring.version` from 4.0.5.RELEASE to 5.2.8.RELEASE.

Updates `spring-core` from 4.0.5.RELEASE to 5.2.8.RELEASE
- [Release notes](https://github.com/spring-projects/spring-framework/releases)
- [Commits](spring-projects/spring-framework@v4.0.5.RELEASE...v5.2.8.RELEASE)

Updates `spring-context` from 4.0.5.RELEASE to 5.2.8.RELEASE
- [Release notes](https://github.com/spring-projects/spring-framework/releases)
- [Commits](spring-projects/spring-framework@v4.0.5.RELEASE...v5.2.8.RELEASE)

Updates `spring-web` from 4.0.5.RELEASE to 5.2.8.RELEASE
- [Release notes](https://github.com/spring-projects/spring-framework/releases)
- [Commits](spring-projects/spring-framework@v4.0.5.RELEASE...v5.2.8.RELEASE)

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

Author: dependabot[bot]

pom.xml

@@ -130,7 +130,7 @@
 
 	<properties>
 		<jersey.version>2.13</jersey.version>
-		<spring.version>4.3.18.RELEASE</spring.version>
+		<spring.version>5.2.8.RELEASE</spring.version>
 		<joda.version>2.3</joda.version>
 		<grizzly.version>2.3.11</grizzly.version>
 		<servlet-api-version>3.0.1</servlet-api-version>