minor #22885 [3.4] Allow 4.* deps (nicolas-grekas)

This PR was merged into the 3.4 branch.

Discussion
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[3.4] Allow 4.* deps

| Q             | A
| ------------- | ---
| Branch?       | 3.4
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #22756
| License       | MIT
| Doc PR        | -

This is implementing option 3 as described in #22756.
See #22769 for corresponding PR on 2.8: everything goes well and this allows catching a few more potential mistakes.

Commits
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c3e1646af8 [3.4] Allow 4.* deps

Author: fabpot

composer.json

@@ -19,11 +19,11 @@
         "php": ">=5.5.9"
     },
     "require-dev": {
-        "symfony/config": "~2.8|~3.0|~4.0.0",
-        "symfony/http-foundation": "~2.8|~3.0|~4.0.0",
-        "symfony/yaml": "~3.3|~4.0.0",
-        "symfony/expression-language": "~2.8|~3.0|~4.0.0",
-        "symfony/dependency-injection": "~3.3|~4.0.0",
+        "symfony/config": "~2.8|~3.0|~4.0",
+        "symfony/http-foundation": "~2.8|~3.0|~4.0",
+        "symfony/yaml": "~3.3|~4.0",
+        "symfony/expression-language": "~2.8|~3.0|~4.0",
+        "symfony/dependency-injection": "~3.3|~4.0",
         "doctrine/annotations": "~1.0",
         "doctrine/common": "~2.2",
         "psr/log": "~1.0"