support newer HSL versions

Author: lexidor

composer.json

@@ -16,7 +16,7 @@
     "require": {
         "hhvm": "^4.25",
         "hhvm/hsl": "^4.25",
-        "hhvm/hsl-experimental": "^4.37"
+        "hhvm/hsl-experimental": "^4.50"
     },
     "require-dev": {
         "facebook/fbexpect": "^2.7",

src/Nuxed/Filesystem/File.hack

@@ -1,7 +1,6 @@
 namespace Nuxed\Filesystem;
 
-use namespace HH\Lib\Str;
-use namespace HH\Lib\Experimental\File;
+use namespace HH\Lib\{File, Str};
 
 final class File extends Node {
   public function getReadHandle(): File\CloseableReadHandle {

tests/Nuxed/Filesystem/FileTest.hack

@@ -4,7 +4,7 @@ use namespace HH\Asio;
 use namespace Nuxed\Crypto\Hex;
 use namespace Nuxed\Filesystem;
 use namespace HH\Lib\Str;
-use namespace HH\Lib\Experimental\File;
+use namespace HH\Lib\File;
 use namespace Facebook\HackTest;
 use function Facebook\FBExpect\expect;