bump ver

composer.json

@@ -1,6 +1,6 @@
 {
   "name": "itsnubix/nowcal",
-  "version": "0.5.0",
+  "version": "0.5.1",
   "description": "A modern PHP library for generating iCalendar v2.0 events",
   "keywords": [
     "icalendar",
@@ -12,11 +12,15 @@
     "source": "https://github.com/itsnubix/nowcal"
   },
   "require": {
-    "php": ">7.1.8",
+    "php": "^7.1.8|^8.0",
     "illuminate/support": "~5.8.0|^6.0|^7.0|^8.0|^9.0",
     "nesbot/carbon": "^2.29.1",
     "ramsey/uuid": "^3.8"
   },
+  "require-dev": {
+    "friendsofphp/php-cs-fixer": "^2.14",
+    "phpunit/phpunit": "^7.1.5|^9.5"
+  },
   "type": "library",
   "license": "MIT",
   "authors": [
@@ -35,9 +39,5 @@
     "psr-4": {
       "Tests\\": "tests/"
     }
-  },
-  "require-dev": {
-    "friendsofphp/php-cs-fixer": "^2.14",
-    "phpunit/phpunit": "^7.1.5"
   }
 }