Make all named exports work for ESM (#2247)

Author: lehni

lib/objection.js

@@ -1,6 +1,14 @@
 'use strict';
 
-const { wrapError, ...DbErrorClasses } = require('db-errors');
+const {
+  DBError,
+  UniqueViolationError,
+  NotNullViolationError,
+  ForeignKeyViolationError,
+  ConstraintViolationError,
+  CheckViolationError,
+  DataError,
+} = require('db-errors');
 const { Model: NativeModel } = require('./model/Model');
 const { QueryBuilder: NativeQueryBuilder } = require('./queryBuilder/QueryBuilder');
 const { QueryBuilderBase } = require('./queryBuilder/QueryBuilderBase');
@@ -88,5 +96,11 @@ module.exports = {
   knexSnakeCaseMappers,
   knexIdentifierMapping,
 
-  ...DbErrorClasses,
+  DBError,
+  UniqueViolationError,
+  NotNullViolationError,
+  ForeignKeyViolationError,
+  ConstraintViolationError,
+  CheckViolationError,
+  DataError,
 };