More pretty configuration example for symfony 4+. Drop mention about not supported symfony version from readme.

Author: andrew-demb

README.md

@@ -1,23 +1,14 @@
 # Symfony Bridge for Jaeger library
 
 ## Getting started
-Register JaegerBundle like any other bundle for Symfony 4
-```
-bundles.php
-[
-...
-\Jaeger\Symfony\JaegerBundle::class => ['all' => true],
-...
-]
-```
-OR for Symfony >=2
-```
-public function registerBundles()
-    {
-        $bundles = [
-            ...
-            new \Jaeger\Symfony\JaegerBundle(),
-            ...
-        ]
-    }
+
+Register JaegerBundle like any other bundle for Symfony 4+
+
+```php
+// bundles.php
+return [
+    // ...
+    \Jaeger\Symfony\JaegerBundle::class => ['all' => true],
+    // ...
+];
 ```