configuartion: update support for sf2

Author: OxCom

DependencyInjection/Configuration.php

@@ -98,7 +98,7 @@ public function getConfigTreeBuilder()
                         ->arrayNode('error_sample_rates')
                             ->treatNullLike([])
                             ->useAttributeAsKey('type')
-                            ->arrayPrototype()
+                            ->prototype('array')
                                 ->children()
                                     ->integerNode('type')->end()
                                     ->floatNode('rate')->end()
@@ -109,7 +109,7 @@ public function getConfigTreeBuilder()
                         ->arrayNode('exception_sample_rates')
                             ->treatNullLike([])
                             ->useAttributeAsKey('class')
-                            ->arrayPrototype()
+                            ->prototype('array')
                                 ->children()
                                     ->scalarNode('class')->end()
                                     ->floatNode('rate')->end()