Bumps [spring-core](https://github.com/spring-projects/spring-framework) from 5.3.15 to 5.3.19.
- [Release notes](https://github.com/spring-projects/spring-framework/releases)
- [Commits](https://github.com/spring-projects/spring-framework/compare/v5.3.15...v5.3.19)

---
updated-dependencies:
- dependency-name: org.springframework:spring-core
  dependency-type: direct:production
...

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