feat: expose Sequelize.BaseError

lib/sequelize.js

@@ -1271,12 +1271,12 @@ Hooks.applyTo(Sequelize.prototype);
 /**
  * Expose various errors available
  */
+
+// expose alias to BaseError
 Sequelize.Error = sequelizeErrors.BaseError;
 
 for (const error of Object.keys(sequelizeErrors)) {
-  if (sequelizeErrors[error] !== sequelizeErrors.BaseError) {
-    Sequelize[error] = sequelizeErrors[error];
-  }
+  Sequelize[error] = sequelizeErrors[error];
 }
 
 module.exports = Sequelize;