Vector3 is now a readonly class (#90)

This requires bumping the minimum PHP version to 8.2, and is also BC breaking.

Author: Dhaiven

.github/workflows/ci.yml

@@ -8,7 +8,7 @@ jobs:
     if: "!contains(github.event.head_commit.message, '[ci skip]')"
     strategy:
       matrix:
-        php: ['8.1', '8.2', '8.3']
+        php: ['8.2', '8.3']
     name: PHP ${{ matrix.php }}
     steps:
     - uses: actions/checkout@v3

composer.json

@@ -4,7 +4,7 @@
     "type": "library",
     "license": "LGPL-3.0",
     "require": {
-        "php": "^8.1",
+        "php": "^8.2",
         "php-64bit": "*"
     },
     "require-dev": {

src/Vector3.php

@@ -33,7 +33,7 @@
 use function sqrt;
 use const PHP_ROUND_HALF_UP;
 
-class Vector3{
+readonly class Vector3{
 	public function __construct(
 		public float|int $x,
 		public float|int $y,