Merge branch 'feature/version_of_3rd_party_components' into 'master'

feat(doc): Add doc to describe each 3rd party component's version

See merge request sdk/ESP8266_RTOS_SDK!82

Author: wujiangang

components/VERSION.md

@@ -0,0 +1,27 @@
+# Version of 3rd party components
+
+## axTLS
+
+## cJSON
+- Source: https://github.com/DaveGamble/cJSON
+- Version: 1.7.6
+
+## freeRTOS
+
+## Lwip
+
+## mbedTLS
+- Source: https://github.com/ARMmbed/mbedtls
+- Version: 2.8.0
+
+## nopoll(websocket)
+
+## paho MQTT
+
+## spiffs
+
+## wolfSSL
+- Source: https://github.com/wolfSSL/wolfssl
+- Version: 3.14.0
+
+> Espressif uses commercial version.