adds jest types

src/express/middleware/errorHandler.spec.ts

@@ -1,5 +1,5 @@
-const errorHandler = require('./errorHandler');
-const APIError = require('../../errors/APIError');
+import errorHandler from './errorHandler';
+import { APIError } from '../../errors';
 
 const testError = new APIError('test error', 503);
 

src/express/middleware/errorHandler.ts

@@ -1,6 +1,8 @@
 import httpStatus from 'http-status';
 import formatErrorResponse from '../responses/formatError';
-const logger = require('../../utilities/logger')();
+import logger from '../../utilities/logger';
+
+logger();
 
 const errorHandler = (config) => async (err, req, res, next) => {
   const data = formatErrorResponse(err);