Rename framework "url" field to "homepage"

Author: ivankravets

platform.json

@@ -32,14 +32,14 @@
       "package": "framework-esp8266-rtos-sdk",
       "script": "builder/frameworks/esp8266-rtos-sdk.py",
       "description": "ESP8266 SDK based on FreeRTOS, a truly free professional grade RTOS for microcontrollers",
-      "url": "https://github.com/espressif/ESP8266_RTOS_SDK",
+      "homepage": "https://github.com/espressif/ESP8266_RTOS_SDK",
       "title": "ESP8266 RTOS SDK"
     },
     "esp8266-nonos-sdk": {
       "package": "framework-esp8266-nonos-sdk",
       "script": "builder/frameworks/esp8266-nonos-sdk.py",
       "description": "The non-OS SDK provides a set of application programming interfaces (APIs) for core ESP8266 functionalities such as data reception/transmission over Wi-Fi, TCP/IP stack functions, hardware interface functions and basic system management functions",
-      "url": "https://github.com/espressif/ESP8266_NONOS_SDK",
+      "homepage": "https://github.com/espressif/ESP8266_NONOS_SDK",
       "title": "ESP8266 Non-OS SDK"
     }
   },