Bump php version

DigiLive · DigiLive · commit ece339e476fc · 2020-10-21T15:27:38.000+02:00
diff --git a/composer.json b/composer.json
@@ -22,7 +22,7 @@
         }
     ],
     "require": {
-        "php": "^7.2"
+        "php": "^7.3"
     },
     "require-dev": {
         "phpunit/phpunit": "^9",
