Maintenance and Bugfix release

[FEATURE] Added ModifyDownloadRegistrationCsvEvent PSR-14 event #1164
[BUGFIX] Set request in parseStringFluid() function #1159
[TASK] Check for existing event in checkConfirmRegistration() #1155
[TASK] Stabilize acceptance tests on GitHub actions
[TASK] Avoid usage of PHP list() function #1158
[TASK] Use ConfigurationManagerInterface instead of ConfigurationManager #1161
[TASK] Drop hint about own templates in notification module #1165
[TASK] Migrate phpunit config
[TASK] Fix warning in FluidStandaloneServiceTest
[DOCS] fix two broken links #1160 - thanks @sandrotanner
[DOCS] Added missing section about addons #1152

Maintenance release

[TASK] Add settings to ModifyUserMessageAttachmentsEvent #1154
[TASK] Remove unused getBackendUser() function in ExportService #1156
[DOCS] Add with-shadow class to images #1153

Maintenance release

[TASK] Add settings to ModifyUserMessageAttachmentsEvent #1154
[TASK] Remove unused getBackendUser() function in ExportService #1156

New features and docs rewrite

[FEATURE] Added PSR-14 events to modify variables for administration module #1149 - thanks @DaRealFreak
[FEATURE] Added ModifyCheckRegistrationSuccessEvent PSR-14 event #1151
[BUGFIX] Exclude disableOverrideDemand in dataHandler hook #1148
[BUGFIX] Show enableInvoice extension setting again
[DOCS] Rework documentation to latest TYPO3 standards #1143
[DOCS] Added backend module template override documentation #1144
[DOCS] Added 2 new PSR-14 events to docs section
[DOCS] Remove eventuid from aspect #1150

Documentation update

[DOCS] Remove eventuid from aspect #1150

New features and bugfixes

[FEATURE] Show registration in saveRegistrationResultAction #1136

Note, that there is a new argument for the saveRegistrationResultAction. Existing route enhancers should be adapted as following (new argument reguid):

-
  routePath: '/save-registration-result/{eventuid}/{reguid}/{result}/{hmac}'
  _controller: 'Event::saveRegistrationResult'
  _arguments:
    eventuid: eventuid
    reguid: reguid
    result: result
    hmac: hmac

[FEATURE] Added PSR-14 event to stop cancellation of depending registrations #1146
[FEATURE] Added ProceedWithPaymentActionEvent PSR-14 event #1139

[BUGFIX] Fix wrong invertStateDisplay for field hidden #1134
[BUGFIX] Respect DisableLanguageMenuProcessor in registration #1138
[BUGFIX] Fix deleteCustomNotificationsByEvent hook - #1140
[DOCS] Added linkhandler configuration #1135 - thanks @georgringer
[DOCS] Add link to documentation about breaking changes #1142
[DOCS] Fixed wrong TypoScript reference

New features and one bugfix

[FEATURE] Show registration in saveRegistrationResultAction #1136

Note, that there is a new argument for the saveRegistrationResultAction. Existing route enhancers should be adapted as following (new argument reguid):

-
  routePath: '/save-registration-result/{eventuid}/{reguid}/{result}/{hmac}'
  _controller: 'Event::saveRegistrationResult'
  _arguments:
    eventuid: eventuid
    reguid: reguid
    result: result
    hmac: hmac

[FEATURE] Added PSR-14 event to stop cancellation of depending registrations #1146
[FEATURE] Added ProceedWithPaymentActionEvent PSR-14 event #1139

[BUGFIX] Respect DisableLanguageMenuProcessor in registration #1138
[TASK] PHP 7.4 compatibility for ProcessCancelDependingRegistrationsEvent #1146
[TASK] Added PHP 7.4 compatibility to ProceedWithPaymentActionEvent #1139
[DOCS] Add link to documentation about breaking changes #1142
[DOCS] Fixed wrong TypoScript reference

Bugfix release

[BUGFIX] Ensure links in RSS template are generated correctly #1130
[BUGFIX] Catch empty currentContentObject in RSS feed #1131
[BUGFIX] Added missing field cruser_id to notification log #1133
[TASK] Optimize TCA for customnotificationlog #1133
[TASK] Use strict return type in BackendUserViewHelper
[TASK] Remove custom requestGetAttributeMapping #1100

Minor bugfixes and improvements

[!!!][TASK] Use core SlidingWindowPagination #1122

Note that this  is a breaking change, if you use the NumberedPagination class, which now has been removed.
Please adapt your code to use the TYPO3 core SlidingWindowPagination instead.

[BUGFIX] use correct execute method for update statement #1127 - thanks @mkarulin
[BUGFIX] Fixed ignore empty sheet exclusion in pluginupdater
[BUGFIX] Fix checkbox display in plugin preview renderer #1123 #1124
[TASK] Ignore empty/invalid FlexForm in plugin updater #1128
[TASK] Fix CSS classes for plugin preview warning #1125
[TASK] Harden plugin preview #1126
[DOCS] Fixed typo in RSS feed documentation #1121 - thanks @medarob

Bugfix release

[FEATURE] Add getter for extension settings in AbstractController #1119
[BUGFIX] Add dispatch for ProcessRedirectToPaymentEvent #1115 - thanks @siwa-tkapplmueller
[TASK] Remove superfluous doc comments in UserRegistrationController
[TASK] Remove unused import
[TASK] Remove superfluous overwrite #1120