Bump spring.version from 5.3.8 to 5.3.9

Bumps `spring.version` from 5.3.8 to 5.3.9.

Updates `spring-core` from 5.3.8 to 5.3.9
- [Release notes](https://github.com/spring-projects/spring-framework/releases)
- [Commits](https://github.com/spring-projects/spring-framework/compare/v5.3.8...v5.3.9)

Updates `spring-context` from 5.3.8 to 5.3.9
- [Release notes](https://github.com/spring-projects/spring-framework/releases)
- [Commits](https://github.com/spring-projects/spring-framework/compare/v5.3.8...v5.3.9)

Updates `spring-beans` from 5.3.8 to 5.3.9
- [Release notes](https://github.com/spring-projects/spring-framework/releases)
- [Commits](https://github.com/spring-projects/spring-framework/compare/v5.3.8...v5.3.9)

Updates `spring-web` from 5.3.8 to 5.3.9
- [Release notes](https://github.com/spring-projects/spring-framework/releases)
- [Commits](https://github.com/spring-projects/spring-framework/compare/v5.3.8...v5.3.9)

Updates `spring-aop` from 5.3.8 to 5.3.9
- [Release notes](https://github.com/spring-projects/spring-framework/releases)
- [Commits](https://github.com/spring-projects/spring-framework/compare/v5.3.8...v5.3.9)

Updates `spring-oxm` from 5.3.8 to 5.3.9
- [Release notes](https://github.com/spring-projects/spring-framework/releases)
- [Commits](https://github.com/spring-projects/spring-framework/compare/v5.3.8...v5.3.9)

Updates `spring-test` from 5.3.8 to 5.3.9
- [Release notes](https://github.com/spring-projects/spring-framework/releases)
- [Commits](https://github.com/spring-projects/spring-framework/compare/v5.3.8...v5.3.9)

Updates `spring-expression` from 5.3.8 to 5.3.9
- [Release notes](https://github.com/spring-projects/spring-framework/releases)
- [Commits](https://github.com/spring-projects/spring-framework/compare/v5.3.8...v5.3.9)

---
updated-dependencies:
- dependency-name: org.springframework:spring-core
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.springframework:spring-context
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.springframework:spring-beans
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.springframework:spring-web
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.springframework:spring-aop
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.springframework:spring-oxm
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.springframework:spring-test
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.springframework:spring-expression
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
diff --git a/pom.xml b/pom.xml
index 8bcea00..3a03772 100644
--- a/pom.xml
+++ b/pom.xml
@@ -253,7 +253,7 @@
         <failIfNoTests>false</failIfNoTests>
         <aspectj.version>1.9.7</aspectj.version>
         <shade.plugin.version>3.2.4</shade.plugin.version>
-        <spring.version>5.3.8</spring.version>
+        <spring.version>5.3.9</spring.version>
         <springws.version>3.1.1</springws.version>
         <exam.version>4.13.4</exam.version>
         <slf4j.version>1.7.31</slf4j.version>