Upgrade to rc5

kirby/src/Toolkit/F.php

@@ -554,6 +554,10 @@ class F
      */
     public static function read(string $file)
     {
+        if (is_file($file) !== true) {
+            return false;
+        }
+
         return @file_get_contents($file);
     }
 
@@ -764,6 +768,18 @@ class F
         return null;
     }
 
+    /**
+     * Returns all extensions of a given file type
+     * or `null` if the file type is unknown
+     *
+     * @param string $type
+     * @return array|null
+     */
+    public static function typeToExtensions(string $type): ?array
+    {
+        return static::$types[$type] ?? null;
+    }
+
     /**
      * Unzips a zip file
      *