Merge pull request #334 from sidoh/fix_wps_build_issue

Fix broken build due to upstream platform changes

platformio.ini

@@ -10,14 +10,13 @@
 
 [common]
 framework = arduino
-platform = https://github.com/platformio/platform-espressif8266.git
+platform = espressif8266@~1.8.0
 board_f_cpu = 160000000L
 lib_deps_builtin =
   SPI
 lib_deps_external =
   sidoh/RF24
-;  WiFiManager
-  https://github.com/cmidgley/WiFiManager
+  sidoh/WiFiManager#cmidgley
   ArduinoJson
   PubSubClient
   https://github.com/ratkins/RGBConverter