Update embedded-io to 0.7

Author: Dirbaio

embedded-nal-async/Cargo.toml

@@ -13,4 +13,4 @@ categories = ["embedded", "hardware-support", "no-std", "network-programming", "
 
 [dependencies]
 embedded-nal = { version = "0.9.0", path = "../" }
-embedded-io-async = { version = "0.6.0" }
+embedded-io-async = { version = "0.7.0" }