require hsl-experimental 4.53 for writeAllAsync

jjergus · jjergus · commit 38850683d417 · 2021-01-15T15:23:15.000-08:00
diff --git a/composer.json b/composer.json
@@ -32,6 +32,7 @@
     ],
     "type": "library",
     "require-dev": {
+        "hhvm/hsl-experimental": "^4.53",
         "hhvm/hacktest": "^2.0",
         "hhvm/type-assert": "^3.1|^4.0",
         "facebook/fbexpect": "^2.6.1",
