re-add blinka requirement

ladyada · ladyada · commit acb4c75fc364 · 2018-09-09T13:59:19.000-04:00
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`	`+Adafruit-Blinka`
`1`	`2`	`adafruit-circuitpython-busdevice`