Vue.js & Spring Boot updates:

vue 2.5.22 --> 2.6.6
vue cli 3.3.0 --> 3.4.0 (incl. all plugins cli-plugin-e2e-nightwatch, cli-plugin-unit-jest, cli-plugin-unit-jest etc)

bootstrap 4.2.1 --> 4.3.1
ajv 6.7.0 --> 6.9.1

Spring Boot 2.1.2 --> 2.1.3

README.md

@@ -3,10 +3,10 @@
 [![Build Status](https://travis-ci.org/jonashackt/spring-boot-vuejs.svg?branch=master)](https://travis-ci.org/jonashackt/spring-boot-vuejs)
 [![Coverage Status](https://coveralls.io/repos/github/jonashackt/spring-boot-vuejs/badge.svg?branch=master)](https://coveralls.io/github/jonashackt/spring-boot-vuejs?branch=master)
 [![License](http://img.shields.io/:license-mit-blue.svg)](https://github.com/jonashackt/spring-boot-vuejs/blob/master/LICENSE)
-[![versionspringboot](https://img.shields.io/badge/springboot-2.1.2_RELEASE-brightgreen.svg)](https://github.com/spring-projects/spring-boot)
+[![versionspringboot](https://img.shields.io/badge/springboot-2.1.3_RELEASE-brightgreen.svg)](https://github.com/spring-projects/spring-boot)
 [![versionnodejs](https://img.shields.io/badge/nodejs-v11.8.0-brightgreen.svg)](https://nodejs.org/en/)
-[![versionvuejs](https://img.shields.io/badge/vue.js-2.5.22-brightgreen.svg)](https://vuejs.org/)
-[![versionvuecli](https://img.shields.io/badge/vue_CLI-3.3.0-brightgreen.svg)](https://cli.vuejs.org/)
+[![versionvuejs](https://img.shields.io/badge/vue.js-2.6.6-brightgreen.svg)](https://vuejs.org/)
+[![versionvuecli](https://img.shields.io/badge/vue_CLI-3.4.0-brightgreen.svg)](https://cli.vuejs.org/)
 [![versionwebpack](https://img.shields.io/badge/webpack-4.28.4-brightgreen.svg)](https://webpack.js.org/)
 [![versionaxios](https://img.shields.io/badge/axios-0.18.0-brightgreen.svg)](https://github.com/axios/axios)
 [![versionjest](https://img.shields.io/badge/jest-23.6.0-brightgreen.svg)](https://jestjs.io/)