Bump spring-core from 4.3.20.RELEASE to 5.3.19 in /samples/server/petstore/spring-mvc-no-nullable

Created by: dependabot[bot]

Bumps spring-core from 4.3.20.RELEASE to 5.3.19.

Release notes

Sourced from spring-core's releases.

v5.3.19

⭐ New Features

• Remove DNS lookups during websocket connection initiation #28280
• Add application/graphql+json Media type and MIME type constants #28271
• Fix debug log for no matching acceptableTypes #28116
• Provide support for post-processing a LocalValidatorFactoryBean's validator Configuration without requiring sub-classing #27956

:lady_beetle: Bug Fixes

• Improve documentation and matching algorithm in data binders #28333
• NotWritablePropertyException when attempting to declaratively configure ClassLoader properties #28269
• BeanPropertyRowMapper's support for direct column name matches is missing in DataClassRowMapper #28243
• AbstractListenerReadPublisher does not call ServletOutputStream::isReady() when reading chunked data across network packets #28241
• ResponseEntity objects are accumulated in ConcurrentReferenceHashMap #28232
• Lambda proxy generation fix causes BeanNotOfRequiredTypeException #28209
• CodeGenerationException thrown when using AnnotationMBeanExporter on JDK 17 #28138

🔨 Dependency Upgrades

• Upgrade to Reactor 2020.0.18 #28329

❤ Contributors

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

• @​GatinMI

v5.3.18

⭐ New Features

• Restrict access to property paths on Class references #28261
• Introduce cancel(boolean mayInterruptIfRunning) in ScheduledTask #28233

:lady_beetle: Bug Fixes

• Move off deprecated API in SessionTransactionData #28234

📔 Documentation

• Introduce warnings in documentation of SerializationUtils #28246
• Update copyright date in reference manual #28237
• @Transactional test does not execute all JPA lifecycle callback methods #28228

❤ Contributors

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

• @​izeye
• @​quaff

... (truncated)

Commits

• cedb587 Release v5.3.19
• a7cf19c Improve documentation and matching algorithm in data binders
• 0cf7f7b Polishing
• 949c3d4 Align plain accessor check
• 3b4ae7b TomcatHttpHandlerAdapter continues after 0 bytes
• 8b39698 Upgrade to Reactor 2020.0.18
• 6fad00e Ensure dynamic proxy with AOP introduction includes lambda interfaces
• 5f6d8df Introduce isLambdaClass() as a public utility in ClassUtils
• 35de7e1 Introduce initializer callback for Bean Validation Configuration
• 10e979e Polishing
• Additional commits viewable in compare view

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