Change min PHP requirement to 7.1.x

Author: cedric-anne

.github/workflows/test-unit.yml

@@ -11,7 +11,7 @@ jobs:
     strategy:
       matrix:
         operating-system: [ 'ubuntu-latest' ]
-        php-versions: [ '5.6', '7.0', '7.1', '7.2', '7.3', '8.0', '8.1', '8.2', '8.3', '8.4' ]
+        php-versions: [ '7.1', '7.2', '7.3', '8.0', '8.1', '8.2', '8.3', '8.4' ]
     steps:
       - name: Checkout
         uses: actions/checkout@v4

composer.json

@@ -3,7 +3,7 @@
   "description": "High definition PHP structures with JSON-schema based validation",
   "type": "library",
   "require": {
-    "php": ">=5.4",
+    "php": ">=7.1",
     "ext-json": "*",
     "phplang/scope-exit": "^1.0",
     "swaggest/json-diff": "^3.8.2",
@@ -35,7 +35,7 @@
   },
   "config": {
     "platform": {
-      "php": "5.4.45"
+      "php": "7.1.33"
     }
   },
   "suggest": {