[2.3] Add missing development dependencies
minor #11340 [2.3] Add missing development dependencies (romainneutron)

This PR was squashed before being merged into the 2.3 branch (closes #11340).

Discussion
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[2.3] Add missing development dependencies

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | n/a
| License       | MIT

I've also added a run of the test suite in every component scope.

Commits
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3b02af9 [2.3] Add missing development dependencies
Merge branch '2.3' into 2.4

* 2.3:
  [2.3] Add missing development dependencies
  Fix @return docs on HttpCache::restoreResponseBody()
  [Finder] Escape location for regex searches
  Make sure HttpCache is a trusted proxy

Conflicts:
	src/Symfony/Bridge/Doctrine/composer.json
	src/Symfony/Bundle/FrameworkBundle/composer.json
	src/Symfony/Bundle/SecurityBundle/composer.json
	src/Symfony/Component/Form/composer.json
Merge branch '2.4' into 2.5

* 2.4:
  [2.3] Add missing development dependencies
  Fix @return docs on HttpCache::restoreResponseBody()
  [Finder] Escape location for regex searches
  Make sure HttpCache is a trusted proxy
Merge branch '2.5'

* 2.5:
  [2.3] Add missing development dependencies
  Fix @return docs on HttpCache::restoreResponseBody()
  [Finder] Escape location for regex searches
  Make sure HttpCache is a trusted proxy

Conflicts:
	src/Symfony/Component/Form/composer.json