bug #16846 [MonologBridge] Monolog Bridge 2.8 is incompatible with HttpKernel 3.0 (derrabus)

This PR was merged into the 2.8 branch.

Discussion
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[MonologBridge] Monolog Bridge 2.8 is incompatible with HttpKernel 3.0

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #16837
| License       | MIT
| Doc PR        | none

Greetings from the SymfonyCon hackday. I wanted to start my day with an easy PR. 😉

As pointed out by @anlutro in #16837, MonologBridge 2.8 uses a deprecated interface of HttpKernel that has been removed in 3.0. Because of this, MonologBridge 2.8 must not be marked as compatible with HttpKernel 3.0 in composer.json.

Commits
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cb8d2c3 Disallow http-kernel 3.x, fixes #16837.

src/Symfony/Bridge/Monolog/composer.json

@@ -20,7 +20,7 @@
         "monolog/monolog": "~1.11"
     },
     "require-dev": {
-        "symfony/http-kernel": "~2.4|~3.0.0",
+        "symfony/http-kernel": "~2.4",
         "symfony/console": "~2.4|~3.0.0",
         "symfony/event-dispatcher": "~2.2|~3.0.0"
     },