Update dependencies and bump hhvm to 3.30 (#6)

Author: ivyhjk

composer.json

@@ -19,15 +19,15 @@
         }
     ],
     "require": {
-        "hhvm": ">=3.28",
-        "facebook/hack-codegen": "^3",
-        "hhvm/hsl": "^3.28",
+        "hhvm": ">=3.30",
+        "facebook/hack-codegen": "^4",
+        "hhvm/hsl": "^3.30",
         "hhvm/type-assert": "^3.2",
         "facebook/fbexpect": "^2",
-        "hhvm/hacktest": "^1.0"
+        "hhvm/hacktest": "^1.3"
     },
     "require-dev": {
-        "hhvm/hhast": "^3.28"
+        "hhvm/hhast": "^3.30"
     },
     "autoload": {
         "psr-4": {