Allow experimental installs on hhvm@next

Author: hershel-theodore-layton

.hhconfig

@@ -7,6 +7,8 @@ hackfmt.tabs = false
 allowed_decl_fixme_codes=2053,4045,4047
 allowed_fixme_codes_strict=2011,2049,2050,2053,2083,3084,4027,4045,4047,4104,4106,4107,4108,4110,4128,4135,4188,4223,4240,4323,4390,4401
 check_xhp_attribute = true
+disable_xhp_element_mangling = true
+enable_xhp_class_modifier = true
 
 ; @see .github/workflows/prepare-environment.sh
 ; requires:4.128

composer.dev.json

@@ -3,7 +3,7 @@
   "description": "HTML elements for sgml-stream in the HTL\\HTMLStream namespace.",
   "license": "MIT",
   "require": {
-    "hhvm": "^4.102",
+    "hhvm": ">=4.102",
     "hershel-theodore-layton/sgml-stream": "dev-master || ^2"
   },
   "require-dev": {

composer.json

@@ -3,7 +3,7 @@
   "description": "HTML elements for sgml-stream in the HTL\\HTMLStream namespace.",
   "license": "MIT",
   "require": {
-    "hhvm": "^4.102",
+    "hhvm": ">=4.102",
     "hershel-theodore-layton/sgml-stream": "dev-master || ^2"
   },
   "require-dev": {},