8.2
[Form] Add a "choice_help" option to ChoiceType
[Form] Deprecate the TimezoneType regions option
Fix tests
Merge branch '6.4' into 7.4
[Form] Offer the canonical timezone identifier when ICU names collide
Use ::class keyword when possible
Merge branch '7.3' into 7.4
[Form] Don't re-add deleted collection entries on submit
Remove some implicit bool type juggling
replace PHPUnit annotations with attributes
CS fixes - native_function_invocation & static_lambda
[Form] Add form type guesser for `EnumType`
replace assertEmpty() with stricter assertions
Use typed properties in tests as much as possible
CS fixes
do not use mocks in tests when not necessary
[Form] Various fixes and hardenings