bodyParsers is deprecated so update with expess bodyParsers (#974)

* Change path-to-regexp 6.2.2 to 6.3.0

* express version update

* bodyParsers is deprecated so update with expess bodyParsers

* update express to 4.21.0

Author: cvchauhan

examples/3-eov-operations/test.js

@@ -1,6 +1,5 @@
 const express = require('express');
 const path = require('path');
-const bodyParser = require('body-parser');
 const logger = require('morgan');
 const http = require('http');
 const { OpenApiValidator } = require('express-openapi-validator');
@@ -10,9 +9,9 @@ const app = express();
 const apiSpec = path.join(__dirname, 'api.yaml');
 
 // 1. Install bodyParsers for the request types your API will support
-app.use(bodyParser.urlencoded({ extended: false }));
-app.use(bodyParser.text());
-app.use(bodyParser.json());
+app.use(bodyParsers.urlencoded({ extended: false }));
+app.use(express.text());
+app.use(express.json());
 
 app.use(logger('dev'));