Fixed ESP8266 _FS_end missing error #26

src/AsyncElegantOTA.h

@@ -7,6 +7,8 @@
 #if defined(ESP8266)
     #include "ESP8266WiFi.h"
     #include "ESPAsyncTCP.h"
+    #include "flash_hal.h"
+    #include "FS.h"
 #elif defined(ESP32)
     #include "WiFi.h"
     #include "AsyncTCP.h"