Migrate to LittleFS under ESP8266

Make ESP8266 use LittleFS instead of deprecated SPIFFS
Make framework use the correct filesystem automatically and handle the call the FS.begin()
Change default MQTT keepalive to 60 seconds
Fix lodash security issue

src/main.cpp

@@ -1,14 +1,13 @@
 #include <ESP8266React.h>
 #include <LightMqttSettingsService.h>
 #include <LightStateService.h>
-#include <FS.h>
 
 #define SERIAL_BAUD_RATE 115200
 
 AsyncWebServer server(80);
-ESP8266React esp8266React(&server, &SPIFFS);
+ESP8266React esp8266React(&server);
 LightMqttSettingsService lightMqttSettingsService =
-    LightMqttSettingsService(&server, &SPIFFS, esp8266React.getSecurityManager());
+    LightMqttSettingsService(&server, esp8266React.getFS(), esp8266React.getSecurityManager());
 LightStateService lightStateService = LightStateService(&server,
                                                         esp8266React.getSecurityManager(),
                                                         esp8266React.getMqttClient(),
@@ -18,13 +17,6 @@ void setup() {
   // start serial and filesystem
   Serial.begin(SERIAL_BAUD_RATE);
 
-  // start the file system (must be done before starting the framework)
-#ifdef ESP32
-  SPIFFS.begin(true);
-#elif defined(ESP8266)
-  SPIFFS.begin();
-#endif
-
   // start the framework and demo project
   esp8266React.begin();