composer downgrade php requirement to 7.3

composer.json

@@ -1,6 +1,6 @@
 {
     "require": {
-      "php": "^7.4",
+      "php": "^7.3",
       "ext-apcu":"*",
       "slim/slim": "4.*",
       "guzzlehttp/psr7": "^1.7",

composer.lock

@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "ed496df05ff8dca1eb812694827251b1",
+    "content-hash": "7b7a3e7031c17eb9ec1c9e470371b6e9",
     "packages": [
         {
             "name": "davedevelopment/stiphle",
@@ -1241,7 +1241,7 @@
     "prefer-stable": false,
     "prefer-lowest": false,
     "platform": {
-        "php": "^7.4",
+        "php": "^7.3",
         "ext-apcu": "*"
     },
     "platform-dev": [],