Merge pull request #145 from makermelissa/master

Update requirements for SpiDev >= 3.4

diff --cc requirements.txt
index b44ee7151b1f6c75166c2eaad5095eb18e1779ed,49b8afcff42b0dd54c8772115625499454658961..433b1222dedaaf4caf7720f8d806641e55181df6
--- 1/requirements.txt
--- 2/requirements.txt
+++ b/requirements.txt
@@@ -1,7 -1,6 +1,7 @@@
  Adafruit-PlatformDetect
  Adafruit-PureIO
 +Jetson.GPIO; platform_machine=='aarch64'
  RPi.GPIO; platform_machine=='armv7l' or platform_machine=='armv6l'
  rpi_ws281x>=4.0.0; platform_machine=='armv7l' or platform_machine=='armv6l'
- spidev; sys_platform == 'linux'
+ spidev>=3.4; sys_platform == 'linux'
  sysv_ipc