fix: Update badges url to reflect current status

Author: euripedesrocha

README.md

@@ -1,17 +1,17 @@
-[![](https://travis-ci.org/tuanpmt/espmqtt.svg?branch=master)](https://travis-ci.org/tuanpmt/espmqtt)
-[![](http://hits.dwyl.io/tuanpmt/espmqtt.svg)](http://hits.dwyl.io/tuanpmt/espmqtt)
-[![Twitter Follow](https://img.shields.io/twitter/follow/tuanpmt.svg?style=social&label=Follow)](https://twitter.com/tuanpmt)
-![GitHub contributors](https://img.shields.io/github/contributors/tuanpmt/espmqtt.svg)
-
 # ESP32 MQTT Library
 
+![GitHub Actions Workflow Status](https://img.shields.io/github/actions/workflow/status/espressif/esp-mqtt/test-examples.yml?branch=master)
+![License](https://img.shields.io/github/license/espressif/esp-mqtt)
+![GitHub contributors](https://img.shields.io/github/contributors/espressif/esp-mqtt)
+
 ## Features
 
-- Based on: https://github.com/tuanpmt/esp_mqtt 
+- Based on: <https://github.com/tuanpmt/esp_mqtt>
 - Support MQTT over TCP, SSL with mbedtls, MQTT over Websocket, MQTT over Websocket Secure
-- Easy to setup with URI 
+- Easy to setup with URI
 - Multiple instances (Multiple clients in one application)
 - Support subscribing, publishing, authentication, will messages, keep alive pings and all 3 QoS levels (it should be a fully functional client).
+- Support for MQTT 3.1.1 and 5.0
 
 ## How to use
 
@@ -20,9 +20,9 @@ Please refer to instructions in [ESP-IDF](https://github.com/espressif/esp-idf)
 
 ## Documentation
 
-* Please refer to the standard [ESP-IDF](https://github.com/espressif/esp-idf), documentation for the latest version: https://docs.espressif.com/projects/esp-idf/
+- Please refer to the standard [ESP-IDF](https://github.com/espressif/esp-idf), documentation for the latest version: <https://docs.espressif.com/projects/esp-idf/>
 
-* Documentation of ESP-MQTT API: https://docs.espressif.com/projects/esp-idf/en/latest/api-reference/protocols/mqtt.html
+- Documentation of ESP-MQTT API: <https://docs.espressif.com/projects/esp-idf/en/latest/api-reference/protocols/mqtt.html>
 
 ## License
 
@@ -33,7 +33,9 @@ Apache License
 ## Older IDF verisons
 
 For [ESP-IDF](https://github.com/espressif/esp-idf) versions prior to IDFv3.2, please  clone as a component of [ESP-IDF](https://github.com/espressif/esp-idf):
+
 ```
 git submodule add https://github.com/espressif/esp-mqtt.git components/espmqtt
 ```
+
 and checkout the [ESP-MQTT_FOR_IDF_3.1](https://github.com/espressif/esp-mqtt/tree/ESP-MQTT_FOR_IDF_3.1) tag