WIP on docs and added basic enums supports

src/Adapter/MySQL.php

@@ -77,7 +77,7 @@ class MySQL implements AdapterInterface {
             throw $ex;
         }
         finally {
-            $this->password = str_repeat('*', strlen($this->password));
+            $this->password = str_repeat('*', random_int(8,16));
         }
 
         return $pdo;
@@ -148,9 +148,12 @@ class MySQL implements AdapterInterface {
         }
     }
 
-    public function writableValue(/* mixed */ $value) /*: mixed*/
+    public function writableValue(mixed  $value) : mixed
     {
         switch (true) {
+            case $value instanceof \UnitEnum:
+                return Ulmus::convertEnum($value);
+
             case is_object($value):
                 return Ulmus::convertObject($value);