Update riscv dependency

Author: katyo

Cargo.toml

@@ -10,7 +10,7 @@ readme = "README.md"
 keywords = ["no-std", "embedded", "usb"]
 
 [dependencies]
-riscv = { version = "0.6.0", optional = true }
+riscv = { version = "0.10.1", optional = true }
 cortex-m = { version = "0.7.0", optional = true }
 embedded-hal = "0.2.4"
 vcell = "0.1.0"