Add ltree column support

src/drivers/PostgresDriver.ts

@@ -428,6 +428,7 @@ export default class PostgresDriver extends AbstractDriver {
                     case "hstore":
                     case "geography":
                     case "geometry":
+                    case "ltree":
                         ret.sqlType = udtName;
                         break;
                     default:

test/integration/entityTypes/postgres/entity/Post.ts

@@ -189,4 +189,7 @@ export class Post {
 
     @Column("geography")
     geography: string;
+
+    @Column("ltree")
+    ltree: string;
 }