8.2
[HttpKernel] Validate typed request attribute values before calling controllers
replace PHPUnit annotations with attributes
Merge branch '6.4' into 7.4
[7.4] Remove usages of named arguments in tests
[HttpKernel] Allow leading zeros in int request attributes
[HttpKernel] Add `#[MapRequestHeader]` attribute and resolver
[HttpKernel] Keep converting scalars of a form payload that carries an uploaded file
[HttpKernel] Preserve named-attribute override on Request/Session value resolvers
replace assertEmpty() with stricter assertions
[HttpKernel] Set propertyPath on MapUploadedFile validation violations