Update composer.json and set php version to 8.0

composer.json

@@ -1,6 +1,6 @@
 {
 	"name": "rotaract/rotaract-club-finder",
-	"description": "WordPress plugin for map visualization of rotaract club locations.",
+	"description": "WordPress plugin to find the nearest Rotaract clubs on an interactive map",
 	"type": "project",
 	"keywords": [
 		"wordpress",
@@ -17,11 +17,11 @@
 		}
 	],
 	"support": {
-		"email": "support@rotaract.de",
+		"email": "entwicklung@rotaract.de",
 		"issues": "https://github.com/rotaract/rotaract-club-finder/issues"
 	},
 	"require": {
-		"php": ">=7.4",
+		"php": ">=8.0",
 		"php-http/guzzle7-adapter": "^1.0",
 		"meilisearch/meilisearch-php": "^v1.6.0",
 		"guzzlehttp/guzzle": "^7.8.1",
@@ -39,7 +39,7 @@
 	},
 	"config": {
 		"platform": {
-			"php": "7.4"
+			"php": "8.0"
 		},
 		"allow-plugins": {
 			"php-http/discovery": true,