chore(deps) Update Rust crate tokio to 1.7 (#1992)

Co-authored-by: Renovate Bot <bot@renovateapp.com>

core/tauri/Cargo.toml

@@ -33,7 +33,7 @@ normal = ["attohttpc"] # we ignore attohttpc because we can't remove it based on
 [dependencies]
 serde_json = { version = "1.0", features = [ "raw_value" ] }
 serde = { version = "1.0", features = [ "derive" ] }
-tokio = { version = "1.6", features = [ "rt", "rt-multi-thread", "sync" ] }
+tokio = { version = "1.7", features = [ "rt", "rt-multi-thread", "sync" ] }
 futures = "0.3"
 uuid = { version = "0.8", features = [ "v4" ] }
 thiserror = "1.0"