Update spring core to v5.3.20

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
org.springframework:spring-aop	5.3.19 -> 5.3.20
org.springframework:spring-tx	5.3.19 -> 5.3.20

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Release Notes

spring-projects/spring-framework

v5.3.20

⭐ New Features

• Refine CachedIntrospectionResults property introspection #​28445
• Improve tests and Javadoc on binding to a property of type javax.servlet.Part #​27830
• WritableResource doesn't have parity with Resource in @Value etc. [SPR-10656] #​15284

🐞 Bug Fixes

• Ignore invalid STOMP frame #​28443
• @ModelAttribute name attribute is not supported in WebFlux #​28423
• Fix BindingResult error when ModelAttribute has custom name in WebFlux #​28422
• Request body deserialization failures are not captured by exception handlers in WebFlux #​28155

📔 Documentation

• Remove Log4J initialization from package-info.java in spring-web #​28420
• Remove Log4J configurer from package-info.java in spring-core #​28411
• Fix github issue reference in RequestMappingHandlerMapping #​28372
• Add Javadoc since tags for GraphQL constants #​28369
• Fix method reference in Kotlin documentation #​28340

🔨 Dependency Upgrades

• Upgrade to ASM 9.3 #​28390
• Upgrade to Reactor 2020.0.19 #​28437

❤️ Contributors

We'd like to thank all the contributors who worked on this release!

• @​izeye
• @​koenpunt
• @​missingdays
• @​zhangmingqi09
• @​binchoo
• @​gorisanson
• @​jprinet
• @​nealshan
• @​bougar

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