Changelog (v5.3.0-BETA4...v5.3.0-RC1)

• security #cve-2021-21424 [Security\Core] Fix user enumeration via response body on invalid credentials (@chalasr)
• bug Fixes Undefined method call #41275 Fixes Undefined method call (@faizanakram99)
• feature [Security] [RememberMe] Add support for parallel requests doing remember-me re-authentication #41175 [Security] [RememberMe] Add support for parallel requests doing remember-me re-authentication (@Seldaek)
• bug [SecurityBundle] Remove invalid unused service #41269 [SecurityBundle] Remove invalid unused service (@chalasr)
• feature [Security] Deprecate the old authentication mechanisms #41247 [Security] Deprecate the old authentication mechanisms (@chalasr)
• bug [Security] [DataCollector] Remove allows anonymous information in datacollector #41139 [Security] [DataCollector] Remove allows anonymous information in datacollector (@ismail1432)
• bug [Security\Http] Fix handling secure: auto using the new RememberMeAuthenticator #41254 [Security\Http] Fix handling secure: auto using the new RememberMeAuthenticator (@chalasr)
• bug [FrameworkBundle][Validator] Fix deprecations from Doctrine Annotations+Cache #41230 [FrameworkBundle][Validator] Fix deprecations from Doctrine Annotations+Cache (@derrabus)
• bug [Mailer] Fix SES API call with UTF-8 Addresses #41206 [Mailer] Fix SES API call with UTF-8 Addresses (@jderusse)
• bug Fixed deprecation warnings about passing null as parameter #41240 Fixed deprecation warnings about passing null as parameter (@derrabus)
• bug [Finder] Fix gitignore regex build with "**" #41241 [Finder] Fix gitignore regex build with "**" (@mvorisek)
• bug [HttpClient] fix adding query string to relative URLs with scoped clients #41224 [HttpClient] fix adding query string to relative URLs with scoped clients (@nicolas-grekas)
• bug [DependencyInjection][ProxyManagerBridge] Don't call class_exists() on null #41233 [DependencyInjection][ProxyManagerBridge] Don't call class_exists() on null (@derrabus)
• bug [Console] fix registering command aliases when using the new "cmd|alias" syntax for names #41214 [Console] fix registering command aliases when using the new "cmd|alias" syntax for names (@nicolas-grekas)
• bug [Notifier] Add missing charset to content-type for Slack notifier #41211 [Notifier] Add missing charset to content-type for Slack notifier (@norkunas)
• bug [Console] Fix Windows code page support #41210 [Console] Fix Windows code page support (@orkan)