Remove zend-i18n dev dependency

Author: Maks3w

composer.json

@@ -19,7 +19,6 @@
         "zendframework/zend-stdlib": "~2.5"
     },
     "require-dev": {
-        "zendframework/zend-i18n": "~2.5",
         "zendframework/zend-servicemanager": "~2.5",
         "fabpot/php-cs-fixer": "1.7.*",
         "phpunit/PHPUnit": "^4.5"

test/CollectionInputFilterTest.php

@@ -50,8 +50,7 @@ public function getBaseInputFilter()
         $filter = new BaseInputFilter();
 
         $foo = new Input();
-        $foo->getFilterChain()->attachByName('stringtrim')
-                              ->attachByName('alpha');
+        $foo->getFilterChain()->attachByName('stringtrim');
         $foo->getValidatorChain()->attach(new Validator\StringLength(3, 6));
 
         $bar = new Input();
@@ -76,8 +75,7 @@ public function getChildInputFilter()
         $filter = new BaseInputFilter();
 
         $foo = new Input();
-        $foo->getFilterChain()->attachByName('stringtrim')
-                              ->attachByName('alpha');
+        $foo->getFilterChain()->attachByName('stringtrim');
         $foo->getValidatorChain()->attach(new Validator\StringLength(3, 6));
 
         $bar = new Input();