Update cfg-if to 1.0

Author: Sh3Rm4n

Cargo.toml

@@ -16,7 +16,7 @@ features = ["stm32f303xc", "rt", "stm32-usbd"]
 targets = ["thumbv7em-none-eabihf"]
 
 [dependencies]
-cfg-if = "0.1"
+cfg-if = "1.0"
 cortex-m = "0.6"
 cortex-m-rt = "0.6"
 embedded-dma = "0.1"