chore: Update version date

Author: germanattanasio

app.js

@@ -21,7 +21,7 @@ const { IamAuthenticator } = require('ibm-watson/auth');
 const app = express();
 // Create the service wrapper
 const nlu = new NaturalLanguageUnderstandingV1({
- version: '2018-04-05',
+ version: '2020-03-10',
  authenticator: new IamAuthenticator({
  apikey: process.env.NATURAL_LANGUAGE_UNDERSTANDING_IAM_APIKEY || 'type-key-here',
  }),