v1.2.0 to fix crashing issue

### Releases v1.2.0

1. Fix crashing issue in mbed_portenta v2.6.1+. To be used with [**Portenta_H7_AsyncTCP releases v1.3.0+**](https://github.com/khoih-prog/Portenta_H7_AsyncTCP/releases/tag/v1.3.0)

Author: khoih-prog

src/libb64/cdecode.c

@@ -12,13 +12,14 @@
   Built by Khoi Hoang https://github.com/khoih-prog/Portenta_H7_AsyncWebServer
   Licensed under GPLv3 license
  
-  Version: 1.1.1
+  Version: 1.2.0
   
   Version Modified By   Date      Comments
   ------- -----------  ---------- -----------
   1.0.0   K Hoang      06/10/2021 Initial coding for Portenta_H7 (STM32H7) with Vision-Shield Ethernet
   1.1.0   K Hoang      08/10/2021 Add support to Portenta_H7 (STM32H7) using Murata WiFi
   1.1.1   K Hoang      12/10/2021 Update `platform.ini` and `library.json`
+  1.2.0   K Hoang      07/12/2021 Fix crashing issue
  *****************************************************************************************************************************/
 
 #include "cdecode.h"

src/libb64/cdecode.h

@@ -12,13 +12,14 @@
   Built by Khoi Hoang https://github.com/khoih-prog/Portenta_H7_AsyncWebServer
   Licensed under GPLv3 license
  
-  Version: 1.1.1
+  Version: 1.2.0
   
   Version Modified By   Date      Comments
   ------- -----------  ---------- -----------
   1.0.0   K Hoang      06/10/2021 Initial coding for Portenta_H7 (STM32H7) with Vision-Shield Ethernet
   1.1.0   K Hoang      08/10/2021 Add support to Portenta_H7 (STM32H7) using Murata WiFi
   1.1.1   K Hoang      12/10/2021 Update `platform.ini` and `library.json`
+  1.2.0   K Hoang      07/12/2021 Fix crashing issue
  *****************************************************************************************************************************/
 
 #pragma once

src/libb64/cencode.c

@@ -12,13 +12,14 @@
   Built by Khoi Hoang https://github.com/khoih-prog/Portenta_H7_AsyncWebServer
   Licensed under GPLv3 license
  
-  Version: 1.1.1
+  Version: 1.2.0
   
   Version Modified By   Date      Comments
   ------- -----------  ---------- -----------
   1.0.0   K Hoang      06/10/2021 Initial coding for Portenta_H7 (STM32H7) with Vision-Shield Ethernet
   1.1.0   K Hoang      08/10/2021 Add support to Portenta_H7 (STM32H7) using Murata WiFi
   1.1.1   K Hoang      12/10/2021 Update `platform.ini` and `library.json`
+  1.2.0   K Hoang      07/12/2021 Fix crashing issue
  *****************************************************************************************************************************/
 
 #include "cencode.h"

src/libb64/cencode.h

@@ -12,13 +12,14 @@
   Built by Khoi Hoang https://github.com/khoih-prog/Portenta_H7_AsyncWebServer
   Licensed under GPLv3 license
  
-  Version: 1.1.1
+  Version: 1.2.0
   
   Version Modified By   Date      Comments
   ------- -----------  ---------- -----------
   1.0.0   K Hoang      06/10/2021 Initial coding for Portenta_H7 (STM32H7) with Vision-Shield Ethernet
   1.1.0   K Hoang      08/10/2021 Add support to Portenta_H7 (STM32H7) using Murata WiFi
   1.1.1   K Hoang      12/10/2021 Update `platform.ini` and `library.json`
+  1.2.0   K Hoang      07/12/2021 Fix crashing issue
  *****************************************************************************************************************************/
 
 #pragma once