update minimum PHP version in composer config and README

README.md

@@ -44,7 +44,7 @@ and for developers you may also need :
 
 This software uses:
 
-* **PHP5.6** currently (migration to PHP7.x is in the pipe)
+* **PHP7.3**
 * **phinx** to inject database schema and initial data / accounts into MySQL see https://phinx.org/ 
 * **php-cs-fixer** to check php code for errors and fix coding standard issues, see https://github.com/FriendsOfPHP/PHP-CS-Fixer
 * **doctrine/dbal** as ORM see https://github.com/doctrine/dbal 

composer.json

@@ -27,7 +27,7 @@
     "config": {
         "preferred-install": "dist",
         "platform": {
-            "php": "5.6.27"
+            "php": "7.3.0"
         }
     }
 }

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": "819b8e04d23484e5101e80999d2258c6",
+    "content-hash": "fb8f251d5cea69faf768853f17539aae",
     "packages": [
         {
             "name": "bcosca/fatfree",
@@ -4806,7 +4806,7 @@
     "platform": [],
     "platform-dev": [],
     "platform-overrides": {
-        "php": "5.6.27"
+        "php": "7.3.0"
     },
     "plugin-api-version": "1.1.0"
 }