drop support for php 7.3, fix branch alias

.github/workflows/ci.yaml

@@ -38,7 +38,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        php: [8.3, 8.2, 8.1, 8.0, 7.4, 7.3]
+        php: [8.3, 8.2, 8.1, 8.0, 7.4]
         stability: [prefer-lowest, prefer-stable]
     name: PHPUnit on PHP ${{ matrix.php }}@${{ matrix.stability }}
     steps:

composer.json

@@ -1,36 +1,38 @@
 {
     "name": "league/iso3166",
     "description": "ISO 3166-1 PHP Library",
-    "autoload": {
-        "psr-4": { "League\\ISO3166\\": "src" }
-    },
-    "autoload-dev": {
-        "psr-4": { "League\\ISO3166\\": "tests" }
+    "keywords": ["ISO 3166", "ISO", "3166", "3166-1", "countries", "library"],
+    "homepage": "https://github.com/thephpleague/iso3166",
+    "license": "MIT",
+    "authors": [{
+        "name": "Rob Bast",
+        "email": "rob.bast@gmail.com"
+    }],
+    "support": {
+        "issues": "https://github.com/thephpleague/iso3166/issues",
+        "source": "https://github.com/thephpleague/iso3166"
     },
     "require": {
-        "php": "^7.3 || ^8.0",
+        "php": "^7.4 || ^8.0",
         "ext-mbstring": "*"
     },
+    "autoload": {
+        "psr-4": { "League\\ISO3166\\": "src" }
+    },
     "require-dev": {
         "phpunit/phpunit": "^9.5"
     },
+    "autoload-dev": {
+        "psr-4": { "League\\ISO3166\\": "tests" }
+    },
     "scripts": {
         "cs-review": "php-cs-fixer fix --verbose --diff --dry-run",
         "cs-fix": "php-cs-fixer fix --verbose",
         "test": "phpunit"
     },
     "extra": {
-        "branch-alias": { "dev-master": "3.x-dev" }
-    },
-    "keywords": ["ISO 3166", "ISO", "3166", "3166-1", "countries", "library"],
-    "homepage": "https://github.com/thephpleague/iso3166",
-    "license": "MIT",
-    "authors": [{
-        "name": "Rob Bast",
-        "email": "rob.bast@gmail.com"
-    }],
-    "support": {
-        "issues": "https://github.com/thephpleague/iso3166/issues",
-        "source": "https://github.com/thephpleague/iso3166"
+        "branch-alias": {
+            "dev-master": "4.x-dev"
+        }
     }
 }