drop Symfony 2.1 support

Author: lsmith77

.travis.yml

@@ -6,7 +6,6 @@ php:
   - 5.5
 
 env:
-  - SYMFONY_VERSION=2.1.*
   - SYMFONY_VERSION=2.2.*
   - SYMFONY_VERSION=2.3.*
   - SYMFONY_VERSION=2.4.*

composer.json

@@ -23,25 +23,25 @@
 
     "require": {
         "php":                            ">=5.3.2",
-        "symfony/framework-bundle":       "~2.1",
+        "symfony/framework-bundle":       "~2.2",
         "doctrine/inflector":             "1.0.*",
         "willdurand/negotiation":         "~1.1.0"
     },
 
     "require-dev": {
-        "sensio/framework-extra-bundle":  "~2.1",
-        "symfony/form": "~2.1",
-        "symfony/validator": "~2.1",
-        "symfony/serializer": "~2.1",
-        "symfony/yaml": "~2.1",
-        "symfony/security": "~2.1",
-        "jms/serializer-bundle": "0.12.*"
+        "sensio/framework-extra-bundle":  "~2.2",
+        "symfony/form":                   "~2.2",
+        "symfony/validator":              "~2.2",
+        "symfony/serializer":             "~2.2",
+        "symfony/yaml":                   "~2.2",
+        "symfony/security":               "~2.2",
+        "jms/serializer-bundle":          "0.12.*"
     },
 
     "suggest": {
         "sensio/framework-extra-bundle":  "Add support for route annotations and the view response listener",
         "jms/serializer-bundle":          "Add support for advanced serialization capabilities, recommended, requires 0.12.*",
-        "symfony/serializer":             "Add support for basic serialization capabilities and xml decoding, requires ~2.1"
+        "symfony/serializer":             "Add support for basic serialization capabilities and xml decoding, requires ~2.2"
     },
 
     "conflict": {