Merge pull request #754 from cyberman54/patch-1

rollback to platformio-espressif 3.0.0

platformio_orig.ini

@@ -57,7 +57,7 @@ extra_scripts = pre:build.py
 otakeyfile = ota.conf
 lorakeyfile = loraconf.h
 lmicconfigfile = lmic_config.h
-platform_espressif32 = espressif32@3.1.0
+platform_espressif32 = espressif32@3.0.0
 monitor_speed = 115200
 upload_speed = 115200 ; set by build.py and taken from hal file
 display_library = ; set by build.py and taken from hal file