feature #14220 [3.0][Console][OutputStyle] Implements verbosity levels methods (ogizanagi)

This PR was merged into the 3.0-dev branch.

Discussion
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[3.0][Console][OutputStyle] Implements verbosity levels methods

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | N/A - Travis build for #14032
| License       | MIT

Implements the verbosity level methods from `OutputInterface` for the new `OutputStyle` abstract class in 3.0 branch.
Fixes Travis builds with `deps=high` env var for #14032 PR and future console style updates.

=========
Related to: #14032, #14057, #14138, #14132, #14172, ...

Commits
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a30f507 [Console] [OutputStyle] Implements verbosity methods

src/Symfony/Component/Console/Style/OutputStyle.php

@@ -113,4 +113,36 @@ abstract class OutputStyle implements OutputInterface, StyleInterface
     {
         return $this->output->getFormatter();
     }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function isQuiet()
+    {
+        return $this->output->isQuiet();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function isVerbose()
+    {
+        return $this->output->isVerbose();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function isVeryVerbose()
+    {
+        return $this->output->isVeryVerbose();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function isDebug()
+    {
+        return $this->output->isDebug();
+    }
 }