Update permitted dependencies

This allows the newer hsl-experimental.

refs #22

Author: fredemmott

composer.json

@@ -7,7 +7,7 @@
   "require": {
     "hhvm": "^4.25",
     "hhvm/hsl": "^4.0",
-    "facebook/hack-http-request-response-interfaces": "^0.2"
+    "facebook/hack-http-request-response-interfaces": "^0.2|^0.3"
   },
   "extra": {
     "branch-alias": {
@@ -19,6 +19,6 @@
     "hhvm/hhast": "^4.0",
     "hhvm/hhvm-autoload": "^2.0.8|^3.0",
     "hhvm/hacktest": "^2.0",
-    "usox/hackttp": "^0.3"
+    "usox/hackttp": "^0.3|^0.4"
   }
 }