…guration values

…pping configuration values (andrew-demb)

This PR was squashed before being merged into the 5.4 branch.

Discussion
----------

[FrameworkBundle] Allow to specify `null` for exception mapping configuration values

| Q             | A
| ------------- | ---
| Branch?       | 5.4
| Bug fix?      | yes
| New feature?  | no <!-- please update src/**/CHANGELOG.md files -->
| Deprecations? | no <!-- please update UPGRADE-*.md and src/**/CHANGELOG.md files -->
| Tickets       |
| License       | MIT
| Doc PR        |
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`null` should be allowed because it is stated as allowed in the configuration info [1][2]
Marked as bugfix due to an existing mismatch between config description and behavior.

[1] https://github.com/symfony/symfony/blob/a2f27add28f7c2c61ef4cfb4e97833509ced0fc0/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Configuration.php#L1219-L1220
[2] https://github.com/symfony/symfony/blob/a2f27add28f7c2c61ef4cfb4e97833509ced0fc0/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Configuration.php#L1227-L1228

Commits
-------

1de8f3a9ff [FrameworkBundle] Allow to specify `null` for exception mapping configuration values

* 5.4:
  [FrameworkBundle] Allow to specify `null` for exception mapping configuration values
  Fix BinaryFileResponse content type detection logic
  [Notifier] [Expo] Throw exception on error-response from expo api
  Bump Symfony version to 5.4.14
  Update VERSION for 5.4.13
  Update CHANGELOG for 5.4.13
  Bump Symfony version to 4.4.47
  Update VERSION for 4.4.46
  Update CONTRIBUTORS for 4.4.46
  Update CHANGELOG for 4.4.46
  [Security] Fix login url matching when app is not run with url rewriting or from a sub folder

* 6.0:
  fix merge
  [FrameworkBundle] Allow to specify `null` for exception mapping configuration values
  Fix BinaryFileResponse content type detection logic
  [Notifier] [Expo] Throw exception on error-response from expo api
  Bump Symfony version to 6.0.14
  Update VERSION for 6.0.13
  Update CHANGELOG for 6.0.13
  Bump Symfony version to 5.4.14
  Update VERSION for 5.4.13
  Update CHANGELOG for 5.4.13
  Bump Symfony version to 4.4.47
  Update VERSION for 4.4.46
  Update CONTRIBUTORS for 4.4.46
  Update CHANGELOG for 4.4.46
  [Security] Fix login url matching when app is not run with url rewriting or from a sub folder