Update composer.json

Author: SlimDeluxe

composer.json

@@ -9,8 +9,9 @@
             "email": "[email protected]"
         }
     ],
+    "keywords": ["gettext","context","pgettext"],
     "require": {
-        "php": ">=5.3",
+        "php": ">=7.2",
         "ext-gettext": "*"
     },
     "require-dev": {