* 4.2:
[Phpunit] fixed support for PHP 5.3
Response prepare method update
[Workflow] Added missing license header
Fix case when multiple loaders are providing paths for the same namespace
Check if Client exists when test.client does not exist, to provide clearer exception message
throw TypeErrors to prepare for type hints in 5.0
[Form] Preventing validation of children if parent with Valid constraint has no validation groups
[Form] Added ResetInterface to CachingFactoryDecorator
Remove deprecated usage
[Tests] fixed compatbility of assertEquals(): void
Fixed usage of TranslatorInterface in form extension (fixes#30591)
[Intl][4.2] Fix test
[Intl] Fix test
[Validator] Add the missing translations for the Arabic (ar) locale
[Intl] Add compile binary
Fix DebugCommand when chain loader is involved
[Form] Fixed some phpdocs
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