SDK-1390: Add sonarcloud badges

Author: echarrod

.travis.yml

@@ -42,7 +42,7 @@ jobs:
     - stage: Analyze
       name: Sonarcloud
       dist: trusty
-      python: "3.6.1"
+      python: "3.8"
       addons:
         sonarcloud:
           organization: "getyoti"

README.md

@@ -1,6 +1,10 @@
 # Yoti Python SDK #
 
 [![Build Status](https://travis-ci.com/getyoti/yoti-python-sdk.svg?branch=master)](https://travis-ci.com/getyoti/yoti-python-sdk)
+[![Coverage](https://sonarcloud.io/api/project_badges/measure?project=getyoti%3Apython&metric=coverage)](https://sonarcloud.io/dashboard?id=getyoti%3Apython)
+[![Bugs](https://sonarcloud.io/api/project_badges/measure?project=getyoti%3Apython&metric=bugs)](https://sonarcloud.io/dashboard?id=getyoti%3Apython)
+[![Code Smells](https://sonarcloud.io/api/project_badges/measure?project=getyoti%3Apython&metric=code_smells)](https://sonarcloud.io/dashboard?id=getyoti%3Apython)
+[![Vulnerabilities](https://sonarcloud.io/api/project_badges/measure?project=getyoti%3Apython&metric=vulnerabilities)](https://sonarcloud.io/dashboard?id=getyoti%3Apython)
 
 Welcome to the Yoti Python SDK. This repo contains the tools and step by step instructions you need to quickly integrate your Python back-end with Yoti so that your users can share their identity details with your application in a secure and trusted way.