Updated npm dependencies

Author: yuanzhou

README.md

@@ -17,7 +17,7 @@ The DeepPhe NLP extracts information from the patient cancer reports and stores
 
 You must have the following tools installed:
 
-- [Nodejs 10.15.1 (includes npm 6.4.1) or the latest LTS version](https://nodejs.org/en/download/) - which the DeepPhe-Viz tool is built upon
+- [Nodejs 12.13.0 (includes npm 6.12.0) or the latest LTS version](https://nodejs.org/en/download/) - which the DeepPhe-Viz tool is built upon
 - [Neo4j 3.5.x Server](https://neo4j.com/download-center/#releases) - is used to store the graph output from DeepPhe NLP
 
 if you need to manage multiple versions of NodeJS, we have been successfully using the [nvm](https://github.com/creationix/nvm) tool to configure and manage our NodeJS environment; nvm enables a user to associate a paritcular NodeJS and NPM version with their Unix shell, allowing for each switching between NodeJS versions across different projects.

lib/routes.js

@@ -5,7 +5,7 @@
  */
 
 // Using joi for API parameters validation with Swagger
-const Joi = require('joi');
+const Joi = require('@hapi/joi');
 
 // Use neo4j-driver to access to Neo4j
 const neo4j = require('neo4j-driver').v1;