Bump spring-core from 5.1.2.RELEASE to 5.1.4.RELEASE
Bump spring-core from 5.1.2.RELEASE to 5.1.4.RELEASE

Bumps [spring-core](https://github.com/spring-projects/spring-framework) from 5.1.2.RELEASE to 5.1.4.RELEASE.
- [Release notes](https://github.com/spring-projects/spring-framework/releases)
- [Commits](https://github.com/spring-projects/spring-framework/compare/v5.1.2.RELEASE...v5.1.4.RELEASE)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
digipost/signature-api-specification