Merge pull request RobTillaart#64 from ivankravets/patch-4

Update Atmel AVR platform ID

Author: RobTillaart

libraries/FastShiftOut/library.json

@@ -16,7 +16,7 @@
  "url": "https://github.com/RobTillaart/Arduino.git"
  },
  "frameworks": "arduino",
- "platforms": "AVR",
+ "platforms": "atmelavr",
  "export": {
  "include": "libraries/FastShiftOut"
  }