Implemented a Type::buildAll() method to cleanup

This helped cleanup another part of the code

src/Database/FieldTypeConverter.php

@@ -47,8 +47,7 @@ public function __construct(TypeMap $typeMap, Driver $driver)
     {
         $this->_driver = $driver;
         $map = $typeMap->toArray();
-        $types = array_keys(Type::map());
-        $types = array_map(['Cake\Database\Type', 'build'], array_combine($types, $types));
+        $types = Type::buildAll();
         $result = [];
 
         foreach ($types as $k => $type) {

src/Database/Type.php

@@ -105,6 +105,20 @@ public static function build($name)
         return static::$_builtTypes[$name] = new static::$_types[$name]($name);
     }
 
+    /**
+     * Returns an arrays with all the mapped type objects, indexed by name
+     *
+     * @return array
+     */
+    public static function buildAll()
+    {
+        $result = [];
+        foreach (self::$_types as $name => $type) {
+            $result[$name] = isset(static::$_builtTypes[$name]) ? static::$_builtTypes[$name] : static::build($name);
+        }
+        return $result;
+    }
+
     /**
      * Returns a Type object capable of converting a type identified by $name
      *