Bump spring.version from 5.3.3 to 5.3.4

Bumps `spring.version` from 5.3.3 to 5.3.4.

Updates `spring-core` from 5.3.3 to 5.3.4
- [Release notes](https://github.com/spring-projects/spring-framework/releases)
- [Commits](https://github.com/spring-projects/spring-framework/compare/v5.3.3...v5.3.4)

Updates `spring-context` from 5.3.3 to 5.3.4
- [Release notes](https://github.com/spring-projects/spring-framework/releases)
- [Commits](https://github.com/spring-projects/spring-framework/compare/v5.3.3...v5.3.4)

Updates `spring-beans` from 5.3.3 to 5.3.4
- [Release notes](https://github.com/spring-projects/spring-framework/releases)
- [Commits](https://github.com/spring-projects/spring-framework/compare/v5.3.3...v5.3.4)

Updates `spring-web` from 5.3.3 to 5.3.4
- [Release notes](https://github.com/spring-projects/spring-framework/releases)
- [Commits](https://github.com/spring-projects/spring-framework/compare/v5.3.3...v5.3.4)

Updates `spring-aop` from 5.3.3 to 5.3.4
- [Release notes](https://github.com/spring-projects/spring-framework/releases)
- [Commits](https://github.com/spring-projects/spring-framework/compare/v5.3.3...v5.3.4)

Updates `spring-oxm` from 5.3.3 to 5.3.4
- [Release notes](https://github.com/spring-projects/spring-framework/releases)
- [Commits](https://github.com/spring-projects/spring-framework/compare/v5.3.3...v5.3.4)

Updates `spring-test` from 5.3.3 to 5.3.4
- [Release notes](https://github.com/spring-projects/spring-framework/releases)
- [Commits](https://github.com/spring-projects/spring-framework/compare/v5.3.3...v5.3.4)

Updates `spring-expression` from 5.3.3 to 5.3.4
- [Release notes](https://github.com/spring-projects/spring-framework/releases)
- [Commits](https://github.com/spring-projects/spring-framework/compare/v5.3.3...v5.3.4)

Signed-off-by: dependabot[bot] <support@github.com>
diff --git a/pom.xml b/pom.xml
index 6893c6e..faab19b 100644
--- a/pom.xml
+++ b/pom.xml
@@ -246,7 +246,7 @@
         <failIfNoTests>false</failIfNoTests>
         <aspectj.version>1.9.6</aspectj.version>
         <shade.plugin.version>3.2.4</shade.plugin.version>
-        <spring.version>5.3.3</spring.version>
+        <spring.version>5.3.4</spring.version>
         <springws.version>3.0.10.RELEASE</springws.version>
         <exam.version>4.13.4</exam.version>
         <slf4j.version>1.7.30</slf4j.version>