Fix possible array-assignement from ini-files

This is a theoretical issue but Psalm has recommendet to fix that.

src/Dictionary/Dictionary.php

@@ -111,6 +111,9 @@ public static function fromFile(string $file): Dictionary
         $dictionary = new Dictionary();
 
         foreach (parse_ini_file($file) as $key => $val) {
+            if (is_array($val)) {
+                continue;
+            }
             $dictionary->dictionary[str_replace('@:', '', $key)] = $val;
         }
 
@@ -133,6 +136,9 @@ public function load($locale)
             return $this;
         }
         foreach (parse_ini_file($file) as $key => $val) {
+            if (is_array($val)) {
+                continue;
+            }
             $this->dictionary[str_replace('@:', '', $key)] = $val;
         }