update composer

composer.lock

@@ -4,8 +4,8 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
         "This file is @generated automatically"
     ],
-    "hash": "54ea009d9b09c1886c0789dadc484a36",
-    "content-hash": "52c31f7df9edd7063e2489ed47e091a7",
+    "hash": "7c34eebd6b8749a1cd09df57e5d1f47a",
+    "content-hash": "087091d0c339e9fa3a551a189ea658bf",
     "packages": [],
     "packages-dev": [
         {
@@ -458,16 +458,16 @@
         },
         {
             "name": "phpunit/phpunit",
-            "version": "5.3.0",
+            "version": "5.3.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/phpunit.git",
-                "reference": "dd3001822b2df8f5add266020e3d2fd3c5db3ae9"
+                "reference": "34a3acb401ae79deb37bc6e5f5ec3d325b369b4c"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/phpunit/zipball/dd3001822b2df8f5add266020e3d2fd3c5db3ae9",
-                "reference": "dd3001822b2df8f5add266020e3d2fd3c5db3ae9",
+                "url": "https://api.github.com/repos/sebastianbergmann/phpunit/zipball/34a3acb401ae79deb37bc6e5f5ec3d325b369b4c",
+                "reference": "34a3acb401ae79deb37bc6e5f5ec3d325b369b4c",
                 "shasum": ""
             },
             "require": {
@@ -482,7 +482,7 @@
                 "phpunit/php-code-coverage": "^3.3.0",
                 "phpunit/php-file-iterator": "~1.4",
                 "phpunit/php-text-template": "~1.2",
-                "phpunit/php-timer": ">=1.0.6",
+                "phpunit/php-timer": "^1.0.6",
                 "phpunit/phpunit-mock-objects": "^3.1",
                 "sebastian/comparator": "~1.1",
                 "sebastian/diff": "~1.2",
@@ -529,7 +529,7 @@
                 "testing",
                 "xunit"
             ],
-            "time": "2016-03-31 21:35:50"
+            "time": "2016-04-07 07:04:34"
         },
         {
             "name": "phpunit/phpunit-mock-objects",
@@ -1155,7 +1155,7 @@
     "prefer-stable": false,
     "prefer-lowest": false,
     "platform": {
-        "php": ">=7.0.5"
+        "php": ">=7.0.0"
     },
     "platform-dev": []
 }