PHP 7.3 compatibility (#117)

* Improve typehint & match styleguide

* fix: checkbox with bracket name notation

* build: update correct versions

* syntax: remove typed properties for 7.3 compliance

.github/workflows/ci.yml

@@ -15,7 +15,7 @@ jobs:
           path: /tmp/composer-cache
           key: ${{ runner.os }}-${{ hashFiles('**/composer.lock') }}
 
-      - uses: php-actions/composer@v5
+      - uses: php-actions/composer@v6
 
       - name: Archive build
         run: mkdir /tmp/github-actions/ && tar -cvf /tmp/github-actions/build.tar ./
@@ -40,9 +40,9 @@ jobs:
         run: tar -xvf /tmp/github-actions/build.tar ./
 
       - name: PHP Unit tests
-        uses: php-actions/phpunit@v2
+        uses: php-actions/phpunit@v3
         with:
-          php_version: 8.0
+          php_version: 7.3
           php_extensions: xdebug
           configuration: test/phpunit/phpunit.xml
           bootstrap: vendor/autoload.php
@@ -61,6 +61,6 @@ jobs:
         run: tar -xvf /tmp/github-actions/build.tar ./
 
       - name: PHP Static Analysis
-        uses: php-actions/phpstan@v2
+        uses: php-actions/phpstan@v3
         with:
           path: src/

composer.json

@@ -4,7 +4,7 @@
 	"type": "library",
 
 	"require": {
-		"php": ">=7.4"
+		"php": ">=7.3"
 	},
 
 	"require-dev": {
@@ -26,7 +26,7 @@
 			"Gt\\CssXPath\\Test\\": "./test/phpunit"
 		}
 	},
-	
+
 	"authors": [
 		{
 			"name": "Greg Bowler",
@@ -35,7 +35,7 @@
 			"role": "Developer"
 		}
 	],
-	
+
 	"funding": [
 		{
 			"type": "github",

src/Translator.php

@@ -23,8 +23,10 @@ class Translator {
 	const EQUALS_STARTS_WITH_OR_STARTS_WITH_HYPHENATED = "|=";
 	const EQUALS_STARTS_WITH = "^=";
 
-	protected string $cssSelector;
-	protected string $prefix;
+	/** @var string */
+	protected $cssSelector;
+	/** @var string */
+	protected $prefix;
 
 	public function __construct(string $cssSelector, string $prefix = ".//") {
 		$this->cssSelector = $cssSelector;