Use JSON format language files

Doing something like 'require "{$language}.php";' is potentially
dangerous if the languages/ folder is written with some malicious
PHP scripts.

Signed-off-by: Jack Cherng <[email protected]>

Author: jfcherng

src/Utility/Language.php

@@ -90,13 +90,13 @@ public function getTranslations(): array
      */
     public function getTranslationsByLanguage(string $language): array
     {
-        $file = __DIR__ . "/../languages/{$language}.php";
+        $file = __DIR__ . "/../languages/{$language}.json";
 
         if (!\is_file($file)) {
             throw new FileNotFoundException($file);
         }
 
-        return require $file;
+        return json_decode(file_get_contents($file), true);
     }
 
     /**

src/languages/bg.php

@@ -0,0 +1,5 @@
+{
+    "old_version": "Стара версия",
+    "new_version": "Нова версия",
+    "differences": "Разлики"
+}

src/languages/bul.json

@@ -0,0 +1,5 @@
+{
+    "old_version": "旧版本",
+    "new_version": "新版本",
+    "differences": "差异"
+}

src/languages/bul.php

@@ -0,0 +1,5 @@
+{
+    "old_version": "舊版本",
+    "new_version": "新版本",
+    "differences": "差異"
+}

src/languages/chs.json

@@ -0,0 +1,5 @@
+{
+    "old_version": "Old",
+    "new_version": "New",
+    "differences": "Differences"
+}