fix missing busdevice dependancy

ladyada · ladyada · commit 9c7815289494 · 2018-08-29T13:06:01.000-04:00
diff --git a/requirements.txt b/requirements.txt
@@ -1 +1,2 @@
 Adafruit-Blinka
+adafruit-circuitpython-busdevice

Original file line number	Diff line number	Diff line change
`@@ -1 +1,2 @@`
`1`	`1`	`Adafruit-Blinka`
	`2`	`+adafruit-circuitpython-busdevice`