update lock file

composer.lock

@@ -4,25 +4,28 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
         "This file is @generated automatically"
     ],
-    "content-hash": "ef2350b58d0ee66262400727956c9786",
+    "content-hash": "2484c4d913548b24cf09a4e02a38b293",
     "packages": [
         {
             "name": "ezyang/htmlpurifier",
-            "version": "v4.8.0",
+            "version": "v4.9.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/ezyang/htmlpurifier.git",
-                "reference": "d0c392f77d2f2a3dcf7fcb79e2a1e2b8804e75b2"
+                "reference": "6d50e5282afdfdfc3e0ff6d192aff56c5629b3d4"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/ezyang/htmlpurifier/zipball/d0c392f77d2f2a3dcf7fcb79e2a1e2b8804e75b2",
-                "reference": "d0c392f77d2f2a3dcf7fcb79e2a1e2b8804e75b2",
+                "url": "https://api.github.com/repos/ezyang/htmlpurifier/zipball/6d50e5282afdfdfc3e0ff6d192aff56c5629b3d4",
+                "reference": "6d50e5282afdfdfc3e0ff6d192aff56c5629b3d4",
                 "shasum": ""
             },
             "require": {
                 "php": ">=5.2"
             },
+            "require-dev": {
+                "simpletest/simpletest": "^1.1"
+            },
             "type": "library",
             "autoload": {
                 "psr-0": {
@@ -48,7 +51,7 @@
             "keywords": [
                 "html"
             ],
-            "time": "2016-07-16T12:58:58+00:00"
+            "time": "2017-03-13T06:30:53+00:00"
         },
         {
             "name": "fguillot/picofeed",