test(coverage): improve coverage config (#609)

Author: leonardobazico

jest.config.js

@@ -1,4 +1,6 @@
 module.exports = {
   preset: 'ts-jest',
   testEnvironment: 'node',
+  coverageReporters: ['text', 'lcov'],
+  collectCoverageFrom: ['src/**/*.*'],
 };

test/e2e/test-kit.ts

@@ -1,7 +1,7 @@
 import * as express from 'express';
 import { Express, RequestHandler } from 'express';
 
-export { createProxyMiddleware, responseInterceptor, fixRequestBody } from '../../dist/index';
+export { createProxyMiddleware, responseInterceptor, fixRequestBody } from '../../src/index';
 
 export function createApp(...middlewares: RequestHandler[]): Express {
   const app = express();