fix ci

Author: 256dpi

Makefile

@@ -49,3 +49,4 @@ build:
 	arduino-cli compile --fqbn "arduino:avr:yun" ./examples/ArduinoYunSecure
 	arduino-cli compile --fqbn "esp32:esp32:esp32:FlashFreq=80" ./examples/ESP32DevelopmentBoard
 	arduino-cli compile --fqbn "esp32:esp32:esp32:FlashFreq=80" ./examples/ESP32DevelopmentBoardSecure
+	arduino-cli compile --fqbn "esp8266:esp8266:arduino-esp8266" ./examples/ESP8266DevelopmentBoard

examples/ESP32DevelopmentBoardSecure/ESP32DevelopmentBoardSecure.ino

@@ -7,6 +7,7 @@
 // by Joël Gähwiler
 // https://github.com/256dpi/arduino-mqtt
 
+#include <WiFi.h>
 #include <WiFiClientSecure.h>
 #include <MQTT.h>