V 0.3.0 - Update, bugfix and maintenance

[UPD] Migrate extension config array, deprecation 82254
[UPD] Replace @lazy with @TYPO3CMSExtbaseAnnotationORMLazy, deprecation 83078
[FIX] Correct namespace for DateTime class
[UPD] Make extension available for TYPO3 10.x
[FIX] Add mandatory form action property to search
[UPD] Make extension available for TYPO3 10 LTS
[FEAT] Wrap plugin with css extension class
[UPD] Dont make l10n_parent fields excludable, important 89672
[FEAT] Dont remove field layout from plugin
[FIX] Correct schema.org itemscope for company address
[FEAT] Add some more schema.org itemprops