Merge branch 'feature/modify_sdk_version_header_file' into 'master'

feat(esp8266): Modify version header file to match SDK v3.4

See merge request sdk/ESP8266_RTOS_SDK!1529

Author: donghengqaz

components/esp8266/include/esp_idf_version.h

@@ -21,7 +21,7 @@ extern "C" {
 /** Major version number (X.x.x) */
 #define ESP_IDF_VERSION_MAJOR   3
 /** Minor version number (x.X.x) */
-#define ESP_IDF_VERSION_MINOR   3
+#define ESP_IDF_VERSION_MINOR   4
 /** Patch version number (x.x.X) */
 #define ESP_IDF_VERSION_PATCH   0