Bump minimum hhvm version to 4.153 for unsafe casts

Author: lexidor

.github/workflows/build-and-test.yml

@@ -13,7 +13,6 @@ jobs:
       matrix:
         os: [ ubuntu-20.04 ]
         hhvm:
-          - '4.128'
           - '4.153'
           - '4.168'
     runs-on: ${{matrix.os}}

composer.json

@@ -5,7 +5,7 @@
   "keywords": ["hack", "router", "routing", "hhvm"],
   "homepage": "https://github.com/hhvm/hack-router",
   "require": {
-    "hhvm": "^4.128",
+    "hhvm": "^4.153",
     "facebook/hack-http-request-response-interfaces": "^0.2|^0.3"
   },
   "extra": {