Don't fix tokio minor version

This is also what they give as an example in their docs: https://docs.rs/tokio/1.2.0/tokio/

Cargo.toml

@@ -34,7 +34,7 @@ tiny-bip39 = { version = "^0.8", optional = true }
 
 # Platform-specific dependencies
 [target.'cfg(not(target_arch = "wasm32"))'.dependencies]
-tokio = { version = "1.0", features = ["rt"] }
+tokio = { version = "1", features = ["rt"] }
 
 [target.'cfg(target_arch = "wasm32")'.dependencies]
 async-trait = "0.1"