Added test when TTL has expired
[HttpKernel] fixed default TTL not applied under certain conditions
Update the fixtures.
bug #10896 [HttpKernel] Fixed cache behavior when TTL has expired and a default "global" TTL is defined (alquerci, fabpot)

This PR was merged into the 2.3 branch.

Discussion
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[HttpKernel] Fixed cache behavior when TTL has expired and a default "global" TTL is defined

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | no
| Fixed tickets | #8232, #10822, #9919
| License       | MIT

From #9919:

"When the cache is stale the `validate` method `forward` the request to the backend. A new response will be created with or without TTL configuration. If the TTL was not set then the default one should be set like in the `fetch` method."

This PR fixes this issue, the tests provided in #9919 pass, and I've tweaked them to avoid the costly sleep calls.

Commits
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e3983e8 [HttpKernel] fixed default TTL not applied under certain conditions
bc42dae Added test when TTL has expired
Disable 5.6 until it is stable again.
bug #10897 [Console] Fix a console test (jakzal)

This PR was merged into the 2.3 branch.

Discussion
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[Console] Fix a console test

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

re #10714

Every wide character in the fixture file is actually 3 ansi-characters long.

Commits
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61108b9 Disable 5.6 until it is stable again.
8cadb49 Update the fixtures.
Merge branch '2.3' into 2.4

* 2.3:
  Disable 5.6 until it is stable again.
  Update the fixtures.
  [HttpKernel] fixed default TTL not applied under certain conditions
  Added test when TTL has expired
Explicitly define the encoding.
bug #10899 Explicitly define the encoding. (jakzal)

This PR was merged into the 2.3 branch.

Discussion
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Explicitly define the encoding.

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

Credits for discovering it go to @nicolas-grekas. Cheers!

Travis for PHP 5.6 cannot be enabled yet as there's one more test failing.

re #10714 #10714

Commits
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619ff58 Explicitly define the encoding.
Merge branch '2.3' into 2.4

* 2.3:
  Explicitly define the encoding.
[HttpKernel] Replace sha1 with sha256 in recently added tests.
bug #10904 [HttpKernel] Replace sha1 with sha256 in recently added tests (jakzal)

This PR was merged into the 2.4 branch.

Discussion
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[HttpKernel] Replace sha1 with sha256 in recently added tests

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

Tests were introduced in #10896 and are broken starting with 2.4, since the hashing algorithm has changed (introduced in #8609).

Commits
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255544f [HttpKernel] Replace sha1 with sha256 in recently added tests.
Fixed incorrect regular plural for -ves words

Fixes singularization for words like caves (cave), staves (staff).
bug #10909 [PropertyAccess] Fixed plurals for -ves words (csarrazi)

This PR was merged into the 2.3 branch.

Discussion
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[PropertyAccess] Fixed plurals for -ves words

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

Fixes singularization for words like caves (cave), staves (staff).

Commits
-------

c7a77c5 Fixed incorrect regular plural for -ves words
[Form] Automatically add step attribute to HTML5 time widgets to display seconds if needed
bug #10777 [Form] Automatically add step attribute to HTML5 time widgets to display seconds if needed (tucksaun)

This PR was squashed before being merged into the 2.3 branch (closes #10777).

Discussion
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[Form] Automatically add step attribute to HTML5 time widgets to display seconds if needed

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #9976, #10203
| License       | MIT
| Doc PR        | none

Same issue as #9976 and #10203: when you add a `time` field to a form with options `single_text` (so HTML5) and `with_seconds`, the generated input does not contain the `step` attribute, therefore the browser does not show them, leading to an error at the submit because of an invalid format.

Compared to #9976/#10203:
* Unit testable
* Available directly in the component
* Available in other templating format than twig
* Still able to customise the step attribute by hand

Commits
-------

a379298 [Form] Automatically add step attribute to HTML5 time widgets to display seconds if needed
Merge branch '2.3' into 2.4

* 2.3:
  [Form] Automatically add step attribute to HTML5 time widgets to display seconds if needed
  Fixed incorrect regular plural for -ves words
Updated form dev dependencies
Fixed FormDataExtractorTest_SimpleValueExporter::exportValue not implementing the interface correctly
minor #10911 [Form] Composer dependencies (csarrazi)

This PR was merged into the 2.4 branch.

Discussion
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[Form] Composer dependencies

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

Right now, launching tests from the Form component's directory doesn't work, due to missing dev dependencies. This should be merged back into master afterwards.

Also fixed a problem related to a bad method signature in ```Symfony\Component\Form\Tests\Extension\DataCollector\FormDataExtractorTest_SimpleValueExporter```

Commits
-------

7b5857c Fixed FormDataExtractorTest_SimpleValueExporter::exportValue not implementing the interface correctly
e4fa5d8 Updated form dev dependencies