Require php >=7.0

Co-authored-by: fqqdk <csaba.simon@emarsys.com>

Author: tillmannr

composer.json

@@ -15,7 +15,7 @@
     "require": {
         "guzzlehttp/guzzle": "~6.0",
         "emartech/escher": "1.*",
-        "php": ">=7.3"
+        "php": ">=7.0"
     },
     "require-dev": {
         "phpunit/phpunit": "9.*",