Update Rust crate thiserror to 1.0.40 (#9)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

async-vfs/Cargo.toml

@@ -13,4 +13,4 @@ readme = "../README.md"
 [dependencies]
 async-trait = "0.1.42"
 futures-lite = "1.12.0"
-thiserror = "1.0.23"
+thiserror = "1.0.40"